BlockFact
Tamper-proof photos in 5 seconds—from capture to blockchain
BlockFact launched on May 1, 2026 with 5 votes, #2,008 of 20,538 launches that month and more than 75% of that year's launches.
What it does
BlockFact proves photos are real at the moment of capture. Zero-knowledge proofs and invisible watermarks are generated on-device in 5 seconds — images never leave your phone. Verified trustlessly on StarkNet. Free SDK for developers to add provenance to any camera app.
Tamper-proof photo verification for journalists, newsrooms, and anyone who needs to prove a photo is real. Free to use. Blockchain-verified. Built on StarkNet.
Now Live on StarkNet Mainnet — BlockFact has upgraded from testnet to the real StarkNet blockchain. Update to v1.6.0 for the full mainnet experience. BlockFact turns every photo into a tamper-proof record — verified at capture, registered on the blockchain, impossible to fake. Built for journalists, newsrooms, and anyone who needs to prove a photo is real. Free to use. No account required. Just take a photo and it's verified. Snap a photo with the BlockFact app. We verify it came from a real device — not a computer or AI generator — and record the time and location. A unique digital fingerprint is embedded directly into the image pixels. It's invisible to the eye but survives screenshots,…from blockfact.io
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ProofSnap - Digital EvidenceJan 2026 · chromewebstore.google.com · ▲1Stop document fraud with blockchain-verified web captures
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