Cryptographic proof that media was captured live, from a real device, in real time — not generated, not edited, not deepfaked.
The Problem
Anyone can generate a photorealistic video with AI. Anyone can edit footage and claim it's original. There's no way to know if media you're watching was actually captured from a real camera sensor, in real time, without tampering.
Until now.
How It Works
Record
Open MIR Capture in your browser or app. Point your camera and hit record — just like any other camera.
Hash in real time
While you record, MIR Capture extracts video frames and computes SHA-256 hashes every few seconds. Each hash links to the previous one, forming an unbreakable chain — streamed to the server during capture, not after.
Sign & assert
When you stop recording, the final video is hashed and a cryptographic assertion is created on MIR Assertions — a public registry that links the video's hash to your identity, the device, and the hash chain.
Verify anywhere
Anyone with the video file can compute its hash, look it up on the registry, and confirm: this video was captured live, from a real camera, by a known capturer, at a specific time and place.
Why It's Trustworthy
Real-time hash chain
Frame hashes are streamed during recording. You can't retroactively build a chain for pre-rendered content — the timestamps and server receipts prove liveness.
Client-side signing
Assertions are signed with a private key that never leaves your device. Even the server can't forge your signature.
Sensor metadata
GPS coordinates, accelerometer, and gyroscope data are embedded in each chain entry — proving physical device presence.
Public verification
Anyone can verify a capture by hashing the file and looking it up. No account needed. No trust required.
No video storage
Your video never leaves your device. We only receive cryptographic hashes and metadata — never the media itself. You keep full control of your files.
Privacy first
We don't share your data with third parties. Account information is used solely to operate the service. Read our privacy policy.
Use Cases
Journalism
Prove footage is authentic and unedited from the moment of capture.
Legal Evidence
Establish chain of custody for video evidence with cryptographic proof.
Insurance Claims
Verify that damage documentation was captured on-site, in real time.
Anti-Deepfake
Distinguish real captures from AI-generated or manipulated media.
Human Rights
Document events with tamper-proof provenance that withstands scrutiny.
Content Creators
Prove original authorship of footage before anyone else can claim it.
Get Started
Create an account, generate a signing key, and start capturing provenance-verified media in your browser. No app install required.