Re: BSV Association – interest in contributing to test suites, pilots, and implementation guides

*Hello Liz,*

Thank you for reaching out. Your timing is excellent. As we move from core
specification work toward implementation guides and pilot frameworks, the
question of "data persistence and non-modification proofs" is becoming a
recurring theme—especially concerning the EUDR and CBAM evidentiary
standards you mentioned.

In my capacity as Chair, I see a clear fit for the contributions you've
described, particularly in the following areas:

   -

   *UORA Reference Architecture:* We are currently defining the binding
   between physical assets and digital DIDs. An "anchoring" layer that
   provides immutable proof-of-existence would be a valuable addition to our
   implementation guidelines.

   -

   *Interoperability Test Suites:* You mentioned providing test fixtures
   for multi-party supply chain scenarios. This is a high-priority area for
   the Verifiable Supply Chain CG as we look to validate our profiles against
   GS1 EPCIS data.
   -

   *Digital Product Passports:* Our work on the UORA protocol is designed
   specifically to handle the lifecycle tracking you mentioned for the EU
   Battery Passport.

*Next Steps:* I would like to invite you to present a brief (10-15 min)
technical overview of your proposed reference architecture at our next
combined Community Group call. We are specifically interested in how the
"anchoring" sits beneath the VC layer without breaking the decentralized
nature of the identifiers.

Furthermore, as our groups operate on a "contribution-first" basis, please
feel free to open an issue or a PR in our GitHub repositories with the
open-source implementation details you mentioned.

Looking forward to seeing how we can strengthen the "truth layer" of these
protocols together.

Best regards,

*Amir Hameed Mir*

Chair, UORA & Verifiable Supply Chain Community Groups

On Mon, 30 Mar 2026 at 19:04, Lizette Louw <lizette.louw@bsvassociation.org>
wrote:

> Hello all,
>
> I'm Liz Louw, a member of the Partnerships team at the BSV Association. As
> W3C members, we've been following the formation and early work of both the
> Verifiable Supply Chain Community Group and the UORA Community Group with
> considerable interest.
>
> I'm writing to ask a practical question: where pilots, test builds, or
> proof-of-concept work is underway across any of the active Community
> Groups, is there appetite for a contributor that brings a public blockchain
> truth layer?
>
> The gap we address is specific. Verifiable credentials and UORA
> attestations define what data is exchanged and how it is structured. What
> they do not themselves guarantee is that the underlying record has not been
> altered between creation and presentation. For regulatory frameworks like
> EUDR and CBAM — where the evidentiary standard is shifting from 'a system
> exists' to 'prove the data has not been modified' — that distinction
> matters materially. BSV provides immutable, timestamped on-chain anchoring
> at sub-cent cost and at throughput scale, sitting beneath existing VC and
> attestation flows as an independent verification layer that any party can
> confirm without relying on an intermediary.
>
> In the context of the Verifiable Supply Chain Community Group, BSV could
> contribute concretely in two ways. For test suite development, we can
> provide a public blockchain anchoring implementation for interoperability
> testing against GS1 EPCIS event data, ISO frameworks, and EUDR/CBAM
> regulatory data models — including verification tooling and test fixtures
> for multi-party supply chain attestation scenarios. For implementation
> guides, we can contribute reference architecture showing how on-chain
> anchoring sits beneath existing EPCIS and VC data flows, specifically
> addressing the cryptographic proof-of-provenance requirement that
> certification platforms alone cannot satisfy for EU market regulators.
>
> For the UORA Community Group, the physical asset attestation protocol maps
> directly onto work we have been doing on Digital Product Passport anchoring
> for the EU battery passport and industrial digital twin ecosystems. We can
> contribute attestation schema input and reference architecture for asset
> lifecycle tracking — particularly for critical minerals and manufactured
> goods where chain-of-custody integrity is under active regulatory scrutiny
> under the EU Critical Raw Materials Act.
>
> All of our reference implementations are open-source and non-commercial,
> available for any group member to build upon, adapt, or extend.
>
> If pilots or test builds are forming in either group — or elsewhere across
> the W3C community groups — where a truth layer would strengthen the output,
> we'd welcome the opportunity to contribute. Happy to share implementation
> details or discuss fit with anyone working on relevant use cases.
>
> Best regards,
>
>
> *Liz Louw*
>
> Head of Education, Partnerships
>
>
>
> *Lizette.louw@bsvassociation.org <Lizette.louw@bsvassociation.org>*
>
>
>
> *https://bsvassociation.org <https://bsvassociation.org>*
>
>
>
>