Immutable Proof
of File Integrity
Cryptographically verify any file existed at a specific point in time. Your files never leave your device—only the hash goes on-chain.
How It Works
Create immutable proof in 5 simple steps
Upload File
Drag and drop any file type. Your file stays local.
Generate Hash
SHA-256 hash calculated instantly in your browser.
Sign & Submit
Connect wallet and submit hash to Solana blockchain.
Get Certificate
Download professional PDF certificate with QR code.
Verify Anytime
Anyone can verify the proof on-chain, forever.
Built for Professionals
Trusted by creators, businesses, and institutions worldwide
Creators
Protect original artwork, music, and digital content with timestamped proof of ownership.
Enterprises
Maintain audit trails and regulatory compliance with immutable document verification.
Legal Firms
Timestamp evidence and contracts with cryptographic proof accepted in court.
Researchers
Prove priority of discovery and protect intellectual property before publication.
Ready to Secure Your Files?
Join thousands of users protecting their digital assets with blockchain-verified proof.
Get Started FreeNo credit card required · Free on devnet · Instant setup