In a world where AI can fake anything,
prove yours was first.
Seal any file or text. Get a cryptographic timestamp — Ed25519 signed, RFC 3161 certified, Bitcoin-anchored. Publicly verifiable. Forever.
50 seals free every month. No credit card.
or click to browse — any format, any size
Built on open standards
Who needs OriginProof?
Anyone who creates something and needs to prove when.
Photographers
Your images get stolen and reposted without credit. Seal your shoots the moment you edit. Prove original ownership in any dispute.
Musicians & Producers
Demo tape disputes and sample claims cost careers. Seal your sessions and demos before anyone else hears them.
Developers
Spec proposals get "borrowed." Seal your architecture docs and proposals before delivery. Every commit can be timestamped automatically.
Writers & Screenwriters
Hollywood has a long history of "we had that idea too." Seal your treatment, outline, or draft before you pitch it to anyone.
Freelancers
Clients dispute who conceived what. Seal your proposals and mockups before you send them. The timestamp is the receipt.
Platforms & APIs
Embed provenance into your product. One API call seals any content your users create. Start at $99/month for 5,000 seals.
How it works
Three layers of proof. One link. Verifiable forever.
1. Seal
Your content is SHA-256 hashed and signed with an Ed25519 key held by NKA Technologies. The hash, not your content, travels the wire.
2. Timestamp
An RFC 3161 timestamp authority certifies the exact second. Then the proof hash is submitted to the Bitcoin blockchain — immutable, decentralized, unkillable.
3. Share
You get a public verification link. Anyone can confirm the proof — no account needed. Share it in disputes, portfolios, contracts, or anywhere you need to say "I made this first."
Simple pricing
Start free. Pay only when you need more.
- ✓ SHA-256 + Ed25519 seal
- ✓ RFC 3161 timestamp
- ✓ Bitcoin anchoring
- ✓ Public verify link
- ✓ Everything in Free
- ✓ Unlimited seals
- ✓ Embeddable proof badge
- ✓ PDF proof bundle export
- ✓ Priority TSA anchoring
- ✓ Everything in Pro
- ✓ 5 team seats
- ✓ API access (5K calls/mo)
- ✓ White-label verify pages
- ✓ Team dashboard
- ✓
POST /api/v1/seal - ✓ Webhook on Bitcoin confirm
- ✓ Verify SDK
- ✓ GitHub Action included
Need 50,000+ API calls or white-label? Talk to us →
The seal only works if it exists before the dispute.
Start sealing your work today. By the time you need the proof, it'll already be in the blockchain.
Create your free account →