Immutable proof that your document existed at a specific point in time. Upload through your dashboard or integrate via API.
Sign in, upload your files, and we handle the rest. Track confirmations and download certified copies from your personal dashboard.
Timestamp hashes programmatically. Pay with Lightning per request. No API keys, no accounts, no sessions to manage.
Upload documents, track blockchain confirmations, and access your certified files anytime. No command line needed.
Watch your certifications move from pending to confirmed on the blockchain.
Verify any certified document directly on the blockchain explorer.
Files stored encrypted in the cloud with signed download links.
Three steps to immutable proof of existence. No accounts required.
Generate a SHA-256 hash locally. Your document never leaves your device. Only the hash is sent to CertVera.
Submit the hash via our L402 API. You'll receive a Lightning invoice. Pay with any Lightning wallet - instant settlement.
Your hash is anchored in a Bitcoin transaction via OP_RETURN. Verification is free, forever, by anyone.
# Hash a file
sha256sum document.pdf
# Timestamp it (returns Lightning invoice)
curl -X POST https://certvera.com/api/l402 \
-H "Content-Type: application/json" \
-d '{"action":"l402_timestamp",
"hash":"a1b2c3..."}'
# Verify later (free, forever)
curl -X POST https://certvera.com/api/l402 \
-H "Content-Type: application/json" \
-d '{"action":"l402_timestamp_verify",
"hash":"a1b2c3..."}'
Built for everyone who needs proof - from individuals to AI agents
Every certification is an on-chain Bitcoin transaction. The most secure, decentralized ledger on earth.
Starting at ~$18. Pay instantly with any Lightning wallet. Dynamic pricing based on network fees.
Once timestamped, anyone can verify a document hash for free. No account needed to verify.
L402 protocol means any AI agent with a Lightning wallet can timestamp documents autonomously.
Dashboard uses passwordless OAuth. API needs no account at all. Your documents stay on your device with the API.
All uploaded files are automatically scanned for malware before certification. Your security matters.
Same price whether you use the dashboard or the API. Currently ~$18-$26 per document.
Per document or hash
No limits, no catches
Whether you prefer a visual dashboard or a developer API, your documents get the same Bitcoin-grade proof of existence.