- Sources: primary, discussion
- Summary: The page states what the tool cannot do: it identifies only the content credential, which says Claude was involved in producing the file, and it cannot tell whether Claude was involved in creating the content. Anthropic states the check runs in the browser, that the file never leaves the device, and that the format is the C2PA industry standard readable by any C2PA-aware tool. Detecting the separate text watermark runs through a Detection API that Anthropic states is in private preview to eligible organizations as required under EU law, so the public tool covers files and not text.
- Why it matters: The public check answers provenance of a file rather than authorship of its content, and the text case is gated behind an application rather than shipped.
- Follow-up: Track whether the Detection API for text opens beyond private preview.
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