Verify a file fingerprint on Base Sepolia.
Verification is a public read. No wallet is required to check whether an exact file hash was registered.
This MVP uses Base Sepolia testnet. No real funds are required.
Select file
Choose the file to check.
Hash locally
Generate the same SHA-256 fingerprint.
Read registry
Query the registry on Base Sepolia.
Check an exact file match
Network: Base Sepolia
Verification checks the deployed OpenProofRegistry contract on Base Sepolia. The selected file never leaves your browser.
Ready to check
Ready for local verification
Select a file to verify an exact hash match.
Validate a downloaded receipt
Import an OpenProof receipt JSON from your device. The schema is checked locally, then the receipt hash is checked against Base Sepolia.
Receipt import
Import a downloaded OpenProof receipt JSON.
Receipt status
Import a receipt JSON to validate it against Base Sepolia.
Recent Verifications
Stored only in this browser. Nothing is uploaded.
No local history yet
Proofs and verifications you complete in this browser will appear here.