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Live challenge

Original or altered?

Check the proof free online at Open Proof. For larger files, use the Free Mac Proof Utility (the Free FactLockFile Viewer for Mac).

Verifies the exact file and signed record—not the physical truth of the scene.

  • Live challenge
  • Real photo, one pixel changed
  • No people, plates, or addresses

Live challenge

Real photo · one copy has one pixel changed

Copy A: outdoor stairwell between tan wood-sided buildings, looking toward a lawn, a tree and a parking lot
Copy A
Copy B: the same outdoor stairwell photo
Copy B

Copy A is the original, FactLocked in FactLockCam on an iPhone. Copy B is the same photo with one pixel changed and nothing else. Check the proof free online at Open Proof. For larger files, use the Free Mac Proof Utility (the Free FactLockFile Viewer for Mac). A match means the checked file still matches its FactLock record. It does not tell you whether a claim or photo is true.

Next step

Protect what matters. Prove what hasn't changed.

Check the proof free online at Open Proof. For larger files, use the Free Mac Proof Utility (the Free FactLockFile Viewer for Mac).

Get FactLockCam for iPhone Check a proof Free Mac Proof Utility Threat model