Bringing verifiable metadata to AT Protocol

Over the past weeks I’ve been exploring how Liccium’s declaration infrastructure can integrate with AT Protocol in a way that feels native to the ecosystem rather than introducing yet another isolated standard.

The result is a proposal for a new Standard.site Lexicon, site.standard.declaration, that enables creators to publish verifiable, machine-readable declaration metadata through their own Personal Data Server (PDS). The proposal does not define new rights vocabularies or trust frameworks. Instead, it provides a common place where applications can discover metadata about signed declarations, regardless of where those declarations are ultimately hosted.

The idea grew from a simple architectural observation: both Liccium and AT Protocol rely on creator-controlled identities, cryptographic signatures, and decentralised publication. Extending the PDS from publishing social content to publishing declaration metadata is therefore a natural evolution of the protocol.

If you’re interested in the background and technical rationale, I’ve written a detailed article explaining the concept.

The corresponding proposal has also been published for discussion with the AT Protocol community.

I’d be very interested in feedback from people working with AT Protocol, Standard.site, digital identity, metadata, publishing, rights management, or AI provenance.