Summary: This guide lays out a simple, zero-trust architecture template for tapping into enterprise blockchain within regulated sectors. We’ll go over the latest regulatory timelines (like MiCA/TFR and PCI DSS 4.0), the crucial cryptography standards you need to know (FIPS 140-3), and a variety of implementation patterns (think SPIFFE/SPIRE, Envoy + OPA, confidential containers, and RATS attestation). Plus, we’ve included real-world examples geared specifically towards the finance and healthcare industries.

Enterprise Blockchain Consulting for Regulated Industries: A Zero‑Trust Architecture Template

Regulated industries aren’t just on the hunt for "blockchain." What they truly need are dependable controls that can pass audits and enable new business models. In this post, we'll dive into what we’re up to at 7Block Labs: a zero-trust reference architecture for enterprise blockchain stacks that meets current regulations and the toughest open standards out there.

Zero-trust isn’t really a product; it’s more like a mindset. We draw our inspiration from NIST SP 800-207 and CISA’s Zero Trust Maturity Model v2.0, but we also tweak it to suit the specific trust boundaries of blockchain--think keys, nodes, smart contracts, and decentralized app layers. If you want to dive into the details, you can check them out here.

What regulators expect in 2024-2026 (and why it matters to your design)

The EU's MiCA regulations are rolling out in stages. Starting on June 30, 2024, the stablecoin and “ART/EMT” rules will be implemented, and then the full CASP rules will come into play on December 30, 2024. The EBA/ESMA technical standards will kick in throughout 2024 and 2025, introducing new reporting requirements and guidelines for “non-EU currency” ART/EMT. Some member states are also allowing a transitional "grandfathering" period until July 1, 2026, so it’s wise to design your systems to accommodate both licensed and transitional setups. (finance.ec.europa.eu)
As for the EU Travel Rule (TFR 2023/1113), it’s set to launch on December 30, 2024. The EBA has rolled out some final guidelines detailing what info needs to accompany crypto transfers and how to handle any missing data. (eur-lex.europa.eu)
When it comes to the FATF Travel Rule, things are still a little inconsistent. An update from June 2024 is calling for stricter implementation and enforcement, so you can expect to see more scrutiny from supervisors in the near future. (fatf-gafi.org)
In the U.S., the BSA/FinCEN classifies anyone managing or exchanging convertible virtual currency as MSBs, but the users themselves aren’t considered MSBs. Be sure to incorporate programmatic KYC/KYT, SAR triggers, and registration requirements into your workflows as you reach those thresholds. (fincen.gov)
For OFAC sanctions, there’s some crypto-specific compliance guidance out there. It’s super important to build in screening and blocking at your policy enforcement points. (ofac.treasury.gov)
PCI DSS 4.0 is officially here, with v3.2.1 being retired as of March 31, 2024. The new "future-dated" requirements became mandatory on March 31, 2025 (that’s v4.0.1 now!). If you’re handling PAN or tokenized card data in your chain apps, make sure your logging, MFA, penetration testing support, and service provider responsibilities are all updated accordingly. (blog.pcisecuritystandards.org)
When it comes to cryptography, you should definitely aim for FIPS 140-3; modules under FIPS 140-2 will be labeled as “Historical” starting September 22, 2026. It’s a smart idea to choose 140-3-validated crypto modules now (think of modern FIPS providers) to avoid any backtracking down the road. (csrc.nist.gov)
Lastly, the federal zero-trust baseline can actually be useful beyond just the U.S. public sector. OMB M-22-09 has laid out some identity-first ZT objectives. You can reference the CISA’s model to craft your roadmap, which should encompass Identity, Devices, Networks, Applications/Workloads, and Data. (idmanagement.gov)

The Zero‑Trust Architecture (ZTA) template for blockchain programs

The template is organized into sections, or planes. Each plane covers the control objective, reference standards, and the specific implementation options we’re currently using.

1) Identity plane (human and non‑human)

Goal: Make sure that each person, workload, and node has a strong, temporary, and verifiable identity; every access request should go through a policy check.

Standards anchor
- Take a look at the NIST SP 800‑207 ZTA components, which cover the Policy Decision Point, Policy Enforcement Point, and continuous evaluation. For all the nitty-gritty details, check it out here.
- CISA’s ZTMM v2.0 puts a spotlight on the Identity pillar. You can learn more about it here.
Implementation pattern
- Let’s dive into workload identities! SPIFFE/SPIRE issue X.509‑SVIDs, while Envoy grabs its certs through the SDS. It's all about having mutual TLS everywhere and making sure those certs rotate automatically. If you want to dig deeper into this, check it out here.
- For managing authorization as code, pair the Envoy external auth filter with an OPA (Rego) sidecar for all your ABAC and RBAC needs. Keep all your policies in Git and roll them out through continuous integration. You can find more info here.
- And don’t forget about human identity! Make sure you've got an enterprise IdP and phishing-resistant MFA set up. Also, consider implementing progressive RBAC for those critical operations like key ceremonies, upgrades, and chain parameters.

Example Rego Snippet

Here's a handy little Rego snippet that demonstrates how to block high-risk transfers unless the enhanced due-diligence flag is activated:

package example

deny[transfer] {
    transfer := input.transfers[_]
    transfer.risk == "high"
    not transfer.enhanced_due_diligence
}

In this code, we’re checking the input.transfers to see if any of them are tagged as high-risk. If a transfer is indeed high-risk and hasn’t been marked for enhanced due diligence, it gets denied.

package tx.authz

default allow = false

allow {
  input.actor.role == "payments-ops"
  input.tx.amount <= 10000
  input.counterparty.kyt_risk <= 50
}

allow {
  input.actor.role == "payments-ops"
  input.tx.amount > 10000
  input.counterparty.kyt_risk <= 70
  input.customer.edd_complete == true
}

2) Network and access plane

Goal: Assume Internal Networks are Hostile; Require mTLS Everywhere; Segment Aggressively

The key idea here is to treat every internal network as if it could potentially be compromised. So, we really need to get mutual TLS (mTLS) up and running everywhere. This approach adds a solid layer of security, ensuring that both parties in a conversation can trust that they are exactly who they say they are.

Let's take a closer look at this:

mTLS Everywhere:
- Make sure every service in your network is using mTLS for communication. This not only encrypts the data but also ensures that both the client and the server are authentic.
- Remember, it’s not just about keeping the data safe; it’s also about making sure that both sides of the connection can trust each other.
Segment Aggressively:
- Set up distinct network segments for various services and departments. This way, if one segment gets compromised, the damage stays contained.
- Implement firewalls and access controls to tightly regulate the communication between segments.

By keeping this mindset, we can really boost our network security. It’s all about staying ahead of the game and being prepared for any possible threats that might be hiding out in our internal environment.

We're rolling with a service mesh that uses Envoy sidecars to manage mTLS, Layer 7 authorization hooks, and tailor-made policies for each service. On top of that, we're taking advantage of SDS from SPIRE to keep those keys in memory only. Want to dive deeper? Check it out here: (spiffe.io).
When it comes to Kubernetes, we're all about ramping up our baseline hardening and tightening up those network policies. We’re following the NSA/CISA Kubernetes Hardening Guidance to keep our pod security, logging, and secrets handling on point. If you're curious to dive deeper, you can check it out here: (cisa.gov).

3) Data and key custody plane

Goal

Keep keys out of plain sight.
Use encryption that fits industry standards.
Make sure records stick to sector retention rules.
Crypto modules: These days, it's smart to go with FIPS 140‑3‑validated modules to avoid the 2026 sunsets. Also, shooting for those 5‑year recertification cycles will help keep everything running smoothly. You can find more info here: (csrc.nist.gov)
Key operations: When it comes to wrapping keys, definitely stick with AES‑KW (SP 800‑38F). If you’re dealing with sensitive structured fields that can’t have their schema changed, format‑preserving encryption (FF1) is the way to go. Also, don't forget about the 2025 draft of SP 800‑38G Rev.1--FF3 is on its way out, and they’re tightening up the minimum domain sizes. So, it's a good idea to start planning those migrations. You can find more details here: (nist.gov)
Custody deployment: Consider using HSMs or a validated KMS that fits your requirements. It's really important to set up quorum approvals for admin and upgrade keys. Plus, remember to attune the HSM/KMS client host before you unseal anything (you can find more details in the “Attestation” section below).

4) Compute and node trust plane

Goal: Ensuring Only Authorized Nodes/Signers Access Secrets or Submit Privileged Transactions

The goal here is to ensure that only the right nodes or signers--those that are fully verified and compliant--can access sensitive secrets or carry out any important transactions.

Confidential computing for validators, relayers, and indexers: Have you considered running your pods inside Trusted Execution Environments (TEEs) with CNCF Confidential Containers? This approach lets you manage your secrets delivery based on successful attestations. For more details, take a look here: (cncf.io).
Remote attestation (IETF RATS): Yep, it’s all about checking the evidence from Trusted Execution Environments (TEEs) and Trusted Platform Modules (TPMs). With this, you can create short-lived tokens that your Open Policy Agent (OPA) policies can utilize. For example, you could configure access so it’s only granted when the attestation result indicates that it’s “trusted.” If you want to dive deeper, check it out here: (ietf.org).

5) Application and supply chain plane

Goal: Continuous Verification of Contracts and Off-Chain Services

We want to keep a close eye on contracts and off-chain services to ensure they're always getting the check-ups they need, and we can easily track where they came from. This way, everything stays clear and dependable!

Secure SDLC: Let’s dive into the NIST SSDF (SP 800‑218) and the upcoming 2024 SP 800‑204D playbook! These handy resources are designed to help you integrate supply chain security right into your CI/CD pipeline. Oh, and make sure you whip up those SBOMs using the NTIA's minimum elements. Plus, don’t skip signing your artifacts--tools like Sigstore or in-toto can help with that. Check it out here: (csrc.nist.gov)
Kubernetes supply chain: It's important to keep NIST SP 800‑204/204A/204C in mind when you're working with microservices, service mesh, and DevSecOps patterns. Try to adopt a C‑ATO‑style approach to maintain continuous compliance. For more information, check it out here: (csrc.nist.gov)

6) Ledger and data‑availability (DA) plane

Choose the Right Ledger Topology and Plan for Data Retention

When it comes to picking the right ledger topology, it’s really important to consider your unique needs and how you plan to handle data retention. Here’s a handy guide to help you sort things out!

Ledger Topologies

Centralized Ledger: With this setup, there's just one main control point, which makes things easier to handle. However, it can be a bit risky if that central point goes down. It's usually a better fit for smaller businesses.
Decentralized Ledger: This is where a bunch of nodes come together to validate transactions. It strikes a fantastic balance between security and efficiency, making it ideal for bigger networks where trust and transparency really matter.
Distributed Ledger: Think of this as a more decentralized approach where every participant holds a full copy of the ledger. This setup boosts resilience--if one node goes offline, the rest can keep things up and running smoothly.

Data Retention Planning

Once you've chosen your topology, the next step is to figure out how long you want to hold onto your data. Here are a few things to keep in mind:

Regulatory Requirements: Certain industries come with some pretty strict rules about how long you need to keep data. It's important to get familiar with what you need to do to stay compliant.
Storage Costs: The longer you hold onto data, the more storage you’ll need. It’s crucial to balance these costs with the perks of having that historical data around.
Access Needs: Consider how often you really need to dig into that old data. If it's just a rare occasion, you might want to go for those longer-term storage options. They tend to be easier on the wallet, even if they're a bit slower when it comes to retrieving your stuff.
Data Types: Different kinds of data might call for unique retention strategies. For instance, sensitive or critical info often needs to be stored longer than stuff that’s not as essential.

Taking a close look at your ledger layout and how long you plan to keep your data can really help you craft a data management strategy that hits the mark and matches your objectives.

Permissioned: At the moment, Hyperledger Fabric 2.5 is the top-notch LTS version you want to look into. It comes packed with some neat features like the Private Data history purge, which is super handy for GDPR compliance and data minimization. The upcoming v3 will bring SmartBFT to the table, but for now, we’re sticking with 2.5 LTS because it’s all about that reliable stability. Want to dive deeper? Check out the details here.
Enterprise Ethereum stacks: When it comes to Hyperledger Besu, it comes with QBFT and on-chain permissioning, which is a big plus. Just keep in mind to secure those validator keys with HSM/KMS for extra protection. If you need more details, check it out here.
Public/L2: With the recent Dencun upgrade (EIP‑4844) on Ethereum, Layer 2 solutions can now tap into blob space to cut down on data availability costs. Just a little FYI: blobs are only kept around for about 18 days, so if you need longer storage or want to keep things for auditing, it's a good idea to set up some compliant archiving outside of that timeframe. You can learn more about it here.

Regulatory‑grade data retention for modern chains

Hey there! If you're in the broker-dealer business or something along those lines, you’ll want to check this out: SEC 17a-4 got an update in 2022 that allows for an “audit-trail alternative” to WORM. All you need is a storage solution that keeps a complete, unchangeable, time-stamped edit log and allows regulators to access it easily. You can set this up on top of object storage with bucket/object-lock, and don’t forget to add some external RFC 3161 time-stamps for that extra layer of independent time anchoring. If you want to dig into the details, head over here: (sec.gov)
Now, when it comes to RFC 3161/5816 TSP, make sure to grab TSA stamps for crucial logs like admin tasks, custody, and any upgrades. This approach gives you solid cryptographic proof that things existed at a certain time, plus it’s a lot more flexible than SHA-1 thanks to ESSCertIDv2. For the nitty-gritty details, take a look here: (rfc-editor.org)
And don’t forget about EIP-4844 blobs! Make sure to archive your L2 rollup inputs and proofs to a compliant storage solution before they hit that ~18-day expiry mark. Capturing content hashes on-chain is crucial for maintaining integrity, so keep that in mind. For more info, check this out: (ethereum.org)

Travel Rule by design

EU: Starting on December 30, 2024, all crypto asset service providers (CASPs) will need to include both originator and beneficiary data with their crypto transfers. This requirement follows TFR 2023/1113 and the European Banking Authority’s 2024 Guidelines, which provide tips on how to handle any missing or incomplete information. To keep everything smooth, you’ll want to set up a message bus that automatically adds those Travel Rule details to your transfers before sending them off. If the payload is missing, just make sure to reject it at the PEP stage. (eur-lex.europa.eu)
Global: The FATF’s 2024 targeted update shows that we’re still falling behind when it comes to implementation. To ensure everything runs smoothly, you should set up your system for counterparty discovery and secure messaging, even if you're dealing with different jurisdictions. (fatf-gafi.org)
U.S.: Double-check that your setup matches the BSA/FinCEN definitions so you don't accidentally turn your microservices that “accept and transmit” into unregistered money transmitters. It’s smart to keep an eye on those code paths and ensure they align with your policies. (fincen.gov)

Putting it together: A reference deployment we stand up in 90-120 days

1) Foundation (Weeks 1-4)

Kick things off by establishing a landing zone with a robust Kubernetes setup, ensuring that we’re tightening up the cluster in line with the NSA/CISA guidelines.
Deployed SPIRE and handed out workloads SVIDs, letting Envoy sidecars take care of mTLS termination.
Got OPA sidecars going to enforce Rego policies for API calls and transaction submissions. Check out more on this at cisa.gov.

2) Crypto and Custody (Weeks 3-8)

Choosing the right FIPS 140‑3 module; integrating HSM/KMS seamlessly.
Key ceremonies backed by a quorum; signer pods managing operations in secure VMs; attestation gates making sure key unsealing goes smoothly. (csrc.nist.gov)

3) Ledger Layer (Weeks 4-10)

You've got some great options to consider: you can jump into a Fabric 2.5 LTS network that features organizations, channels, and private data collections; take a look at a Besu QBFT network with its account/role permissioning; or you could explore integrating an L2 rollup with the 4844 archiving pipeline. For more details, check it out at (hyperledger-fabric.readthedocs.io).

4) Compliance Services (Weeks 6-12)

We’re working on weaving sanctions and KYT hooks into the OPA policies for our API and mempool entry points.
There’s a new microservice in the pipeline to enhance the Travel Rule, specifically designed for the EU TFR profile, with a backup aligned to the FATF baseline.
We’re also rolling out SEC 17a‑4 audit trail storage for our crucial records, complete with RFC 3161 time stamps. You can dive into the details here!

5) SDLC & Evidence (Weeks 1-12, ongoing)

We’re going to roll out SSDF/204D in our CI process, whip up SBOMs for all our services, make sure our build provenance is signed, and manage our change-controlled Rego policies using GitOps. For all the nitty-gritty, take a look here: (csrc.nist.gov)

Example: Financial services “tokenized payments rail”

Problem: We’ve got to figure out how to transfer fiat-settled stablecoin payments between our subsidiaries. While doing this, we need to stay on top of per-payment sanctions screening and ensure that we’ve got PCI-compliant controls ready to handle any PAN-related data.
Architecture Moves
- We're tightening up smart contracts by implementing policy-governed admin keys in HSM. If we need to roll out any upgrades, we'll make sure to get a quorum on board along with an attestation token.
- Here’s how the transaction flow goes: first, the client signs → then our ingress API (Envoy) checks the OPA policy → we run sanctions and Know Your Transaction (KYT) checks → next, we do mTLS to the signer → finally, it's submitted to Besu using QBFT or L2 → and we wrap it all up by archiving the data inputs to storage that meets 17a-4 compliance, complete with a TSA time-stamp. You can dive into more details here.
PCI Implications
- Whenever card data is involved, we need to treat our network like it’s part of the Cardholder Data Environment (CDE). This means implementing Multi-Factor Authentication (MFA) for everyone accessing it (Req 8), setting up automated alerts for any failed log reviews (A3.3.1), and ensuring we support customer penetration tests (Req 11.4.7). To make this happen, we'll isolate tenants and give them access to read-only sandboxes. This is all set to roll out on March 31, 2025. If you want to dive deeper, check out more details here.
MiCA/TFR
- When it comes to transactions in the EU, we’ll be adding Travel Rule payloads based on the EBA Guidelines. If any transfers are missing info, they’ll either be turned away or slowed down, plus we’ve got to maintain detailed audit trails of how we enrich and validate the data. If you're curious to dive deeper, check it out here.

KPIs to Keep an Eye On

Policy Coverage: What portion of our endpoints are protected by OPA?
Validated Transactions: How many transactions have a validated Travel Rule payload included?
Signer Revocation Time: How quickly can we revoke a signer if an attestation doesn’t go through?
Audit Trail Tests: Are we successfully passing our tests for keeping the audit trail immutable?

Example: Healthcare data exchange on a permissioned ledger

Problem: We’ve got to share clinical events and proof of consent between providers, all while staying compliant with HIPAA’s minimum necessary rules and keeping everything easy to audit.
Architecture Moves
- With Fabric 2.5 LTS, we’ve created private data collections for Protected Health Information (PHI), plus the purge history features make data minimization a breeze.
- For identities, we’re using an enterprise IdP for our staff while tapping into SPIFFE/SPIRE for our workloads. The Open Policy Agent (OPA) steps in to check for “minimum necessary” requirements right at request time, and all our inter-service traffic is secure with mTLS via Envoy. Want to dive deeper? Check it out here.
- We’re handling patient consent and provider credentials using W3C Verifiable Credentials 2.0. These contracts make sure the VC proofs are verified on the client side before any writes occur. If you're curious, you can find more info here.
Evidence
- We’re keeping our time-stamped audit logs in accordance with RFC 3161 and run quarterly attestation drills for the confidential pods that host our consent verifiers. For further reading, check out the details here.

Emerging practices to put on your 2025-2026 roadmap

Awesome news! Verifiable Credentials 2.0 is now a W3C Recommendation! This opens the door for using VCs in onboarding - whether it's for KYC/KYB, managing customer permissions, or even machine-to-machine authorization. Dive into the details here: (w3.org)
It looks like Ethereum's blob market could really take off after Dencun, especially with the targets for blobs per block. It’s smart to set up some blob-aware fee guardrails and monitoring to ensure everything keeps running seamlessly. Check out the nitty-gritty details here: (ethereum.org)
Just a quick heads up about FIPS 140-2! To avoid any last-minute surprises in late 2026, it’s a good idea to start planning your module swaps this year. Also, don’t forget to keep an eye on your vendors’ 140-3 validations. You can find more details right here: (csrc.nist.gov)
NIST SP 800-38G Rev.1 is about to roll out some official updates, and one big change is the removal of FF3. If you’re currently using FF3, now's a great moment to reassess your situation and consider transitioning to FF1, especially with the new draft constraints in mind. For all the details, check it out here: (csrc.nist.gov)
If you’re on the hunt for some real-world examples of zero trust, check out the NCCoE’s “Implementing a ZTA” guide. It's loaded with cool insights that can enhance your “policy patterns” collection, including SASE/SDP, EIG, and microsegmentation. Trust me, it’s definitely worth diving into! You can find it here: (pages.nist.gov)

Audit‑ready evidence model (what your CISO and counsel will ask for)

Identity and access
- We maintain thorough logs of our allow/deny decisions for every single request. This includes things like policy version hashes (that’s the OPA bundle digest, just so you know), the identities of actors involved (whether it's a human or a workload), attestation result IDs, and links to transaction hashes.
Cryptography
- So, here’s the deal: we’ve got FIPS certificate numbers for our modules, records from key ceremonies, and monthly proof of key rotations, plus info about the signer’s OS patch level (all sourced right from the attestation Evidence). You can take a look at it over at (csrc.nist.gov).
Data retention
- We’ve got our SEC 17a-4 audit-trail configurations, retention policies, and TSA validation scripts all lined up to ensure everything’s running smoothly. On top of that, we do quarterly restore drills just to stay on the safe side. If you’re curious for more details, check out the info at (sec.gov).
Travel Rule
- We make sure that all the info about the sender and receiver is properly attached, validated, and available for our partners. We also keep an eye on any exceptions that come up and how we deal with them, all according to the EBA Guidelines. If you're curious for more details, check it out here: (eba.europa.eu).

Common pitfalls we fix in reviews

Signer nodes are basically “just pods.” They need to be properly attested; if not, you’re putting your policy choices and custody at risk. It might be a good idea to look into confidential VMs and RATS for added security. You can read more about it here: (cncf.io).
Just a quick reminder about blob retention on L2s! If you might need anything for more than around 18 days, be sure to archive it to some compliant storage where you can check the integrity. For more details, check out (ethereum.org).
So, if you're running a multitenant setup and handling anything related to card processing, it's time to get serious about those PCI 4.0 service provider updates. You’ll need to step up your game with customer pen tests and keep validating the scope every six months. Now's the time to kick off those isolated test tenants! For more details, check this out: (schellman.com).

How 7Block Labs can help

A 6-12 week zero-trust baseline designed specifically for blockchain workloads, which includes SPIRE, Envoy+OPA, CI/SSDF, FIPS crypto, and attestation.
Laying out regulatory controls (such as MiCA/TFR, PCI 4.0/4.0.1, BSA/OFAC) and translating them into straightforward policies and logs.
Developing architecture patterns for Fabric, Besu, and L2 that make sure your data retention is ready for audits.

If you need a solid workshop agenda or a readiness assessment checklist tailored to your needs, we’re here to help! Just let us know, and we can share a sample with you and tweak it to match your stack just right.

References and standards cited

If you're looking to really get into Zero Trust Architecture, check out NIST SP 800‑207. They’ve got a solid guide on how to implement it, too! You can find it here.
Want to up your security game? The CISA Zero Trust Maturity Model v2.0 is a must-read! Grab it here.
For my folks in the EU, you definitely don’t want to miss the MiCA/EBA RTS and supervisory priorities, plus the EU TFR 2023/1113 and EBA Travel Rule Guidelines. Get the scoop here.
The FATF is rolling out its 2024 targeted update on Virtual Assets and Virtual Asset Service Providers (Travel Rule). Get all the details here.
If you’re involved with virtual currencies, make sure to check out the important guidance and rulings from FinCEN. Stay informed here.
Oh, and don’t skip the OFAC's guidance on virtual currency sanctions! It’s vital for staying compliant. You can read it here.
Keep up with the latest updates on PCI DSS v4.0.1--it’s crucial for maintaining payment security. Check out the details here.
Interested in the FIPS 140‑3 transition and CMVP status? Here’s where you can find all the info you need here.
For the tech enthusiasts out there, dive into how to use SPIFFE/SPIRE with Envoy SDS, and don’t forget about the OPA‑Envoy authorization plugin and GitOps best practices. Details await you here.
The NSA/CISA has put together some great Kubernetes Hardening Guidance that you should definitely check out. Find it here.
Looking to boost your CI/CD supply chain security? Take a look at SSDF (SP 800‑218) and NIST SP 800‑204D, plus explore the NTIA SBOM minimum elements. Get the details here.
Hyperledger Fabric 2.5 LTS is rolling out some exciting features, including Besu QBFT for permissioned networks. Dive into the details here.
If you’re keeping up with blockchain tech, make sure to check out Ethereum’s Dencun (EIP‑4844 blobs). It’s definitely worth a look! Check it out here.
The SEC has made some changes to 17a‑4 regarding electronic records, which gives you an alternative for audit trails. Stay informed here.
Curious about time-stamping? Dive into RFC 3161/5816 for all the details. Check it out here.
Lastly, the W3C has released the Verifiable Credentials 2.0 Recommendation. This is a key resource you won’t want to miss, so make sure to check it out here.

When you build blockchain projects using a zero-trust reference architecture focused on NIST/CISA, along with tools like SPIFFE, Envoy, and OPA, and then amp it all up with confidential computing and RATS while keeping in check with MiCA/TFR, PCI 4.0, and BSA/OFAC, you can cruise through development without constantly worrying about audits. That’s the approach we take for every project here at 7Block Labs.