Witness helps you prove a photo or video is exactly what it claims to be — even after it's been shared on social media.
Only works with media recorded using the Witness app
Verify media captured with the Witness app
Supported:
Simple. Reliable. No technical knowledge needed.
Take a photo or video using the Witness app. It is cryptographically signed using your device's TEE — a unique seal that can never be faked.
The signature is anchored on the Bitcoin blockchain via OpenTimestamps, creating a permanent timestamp that no one can alter.
Anyone can check whether the media is genuine and unedited, even after it has been shared and compressed on social media.
Document events with verifiable proof. Essential for investigative journalism and field reporting.
Court-ready evidence with cryptographic timestamps. Admissible proof for legal proceedings.
Prove authenticity on social platforms. Build trust with your audience through verified content.
Photo claim proof with timestamps. Irrefutable evidence for insurance claims and disputes.
"Essential tool for investigative journalism in Nigeria. The cryptographic proof gives our reports undeniable credibility."
Chidi Okonkwo
Journalist, The Guardian Nigeria
"Changed how we handle evidence in court cases. The blockchain timestamps provide irrefutable proof of authenticity."
Barrister Amaka Eze
Legal Practice, Lagos
"Perfect for content creators who value authenticity. My followers trust my content more knowing it's verified."
Tunde Williams
Content Creator, 2M followers
Download the Witness app and start creating cryptographically signed photos and videos