claim.missing
No readable active C2PA claimClaim: The part of a C2PA manifest that lists every assertion by hash and is then signed, so no assertion can change unnoticed. is present.
This check failed.
What to do
No readable claim was found, so the file shows no checkable label. Sign it, or request a signed copy from the source.
What the missing parts cover
Whether the file carries a readable claim at all, and whether each ingredientIngredient: A source file used to make new content, recorded in the new content's label with a link to its own label.'s manifestC2PA manifest: The signed label itself: a small package inside a file that records who signed it, what they declared and how to check it. is present.
Check a file yourself
Install the open-source Encypher C2PAC2PA: The Coalition for Content Provenance and Authenticity: the group that publishes the open standard for content labels. command-line tool. It runs on your machine and reports these codes for any supported file format.
cargo install encypher-c2pa-cliCreate. Mark. Endure.
The Encypher APIAPI: Application programming interface: a way for one program to ask another to do a job, such as sign a file. returns these codes over HTTP, so your product can act on them.