Photo editing and AI generation have advanced to the point where images can no longer be taken at face value. VeriChain is an open cryptographic provenance system that lets cameras and editors sign every image — so anyone can verify its origin, integrity, and full edit history.
Photorealistic AI generation means fabricated images are now indistinguishable from photographs to the naked eye — and often to forensic tools too.
Social media has turned everyone into an amateur journalist. When a newsroom receives an image from an unknown source, how can they guarantee its authenticity?
Non-destructive editing, deepfakes, and context manipulation mean that even genuine photographs can be altered in ways that change their meaning entirely.
VeriChain works by signing images at the moment they are taken — before any editing can occur. Every subsequent edit is recorded as a signed, append-only event. The result is a tamper-evident chain of custody that travels with the image forever.
A camera app with VeriChain support signs the raw image bytes with an Ed25519 private key the moment the shutter fires. A SHA-256 content hash and a signed manifest are attached as a sidecar file.
Every edit — crop, brightness, colour adjust — is appended as a signed event to the manifest. The chain is append-only and any tampering breaks the hash chain.
The photo and its manifest are shared together as a single .verichain bundle. The manifest travels with the image wherever it goes.
Anyone with VeriLens can verify the image — checking its content hash, manifest hash, signature, and hash-chain continuity in seconds.
Verify images received from citizen journalists, tipsters, and wire services. Know immediately whether an image has been edited and by whom, before it goes to print.
Integrate VeriChain into your camera app or image editor and join a growing ecosystem committed to authentic, trustworthy imagery.
Maintain long-term provenance records for your digital asset library. VeriChain manifests are plain JSON — readable and archivable indefinitely.
Explore VeriLens, our reference iOS app, or get in touch to learn how VeriChain can work for your organisation.