Oliver: Provable Witness
Create tamper-proof media with cryptographic hash chains and C2PA manifests. Capture, verify, and share photos and videos you can prove are authentic.
See it in action
Capture
Record video and audio while Oliver builds SHA3-256 hash chains in the background. GPS, compass, and accelerometer data are captured alongside your media.
Verify
Re-compute the hash chain for any asset at any time. Oliver replays every frame and sensor reading to confirm nothing has been modified.
Share
Export verified media as an .oliver package. Recipients can independently verify the hash chain to confirm authenticity.
Import
Already have media? Import photos, videos, and audio to generate hash chains for existing content. Supports MP4, MOV, JPG, PNG, and more.
C2PA Content Credentials
Oliver embeds C2PA manifests directly into your media, following the industry standard for content authentication.
Works Offline
No cloud required for capture or verification. Your proofs are generated and validated entirely on your device.
Built for people who need proof
- Journalists documenting events in the field
- Legal professionals gathering admissible evidence
- Insurance adjusters recording claims
- Human rights organizations preserving testimony
- Content creators proving originality
- Anyone who needs their media to be believed