Anthropic's Check Files page is recorded as a provenance-tooling signal. It gives users a direct surface for checking whether files were made with Claude, which matters because generation provenance is shifting from metadata discussions into product UX.
This is not a broad authenticity solution. The site value is narrower: model vendors are starting to expose user-facing inspection workflows for artifacts created in their own systems. The follow-up is whether those checks become interoperable, auditable, and available at publish or export boundaries.