Traditional notaries prove a document exists. But in 2026, most content is AI-generated. The question isn't "does this exist?" — it's "what does this mean and why was it created?" AmiStampAI answers that with cryptographic proof.
No account required. Works in browser. Takes 30 seconds.
A real AmiStampAI certificate contains everything needed for independent verification.
Every AmiStampAI seal binds three dimensions that no other notary captures together.
The document exists and has not been altered. SHA-256 hash, ECDSA signature.
What the author declares this document means. Recorded, signed, immutable.
Why it was created. The declared purpose, cryptographically bound to the content.
Traditional notarization vs. AmiStampAI.
| Capability | Traditional | Blockchain-only | AmiStampAI |
|---|---|---|---|
| Proves existence | Yes | Yes | Yes |
| Proves authorship | Yes | Yes (if signed) | Yes (cryptographically bound) |
| Certifies meaning | No | No | Yes |
| Certifies intention | No | No | Yes |
| Immutable record | No | Yes | Yes |
| Verifiable by anyone | No | Yes | Yes |
| Speed | Days to weeks | Seconds | Local: <5s · Chain: <30s |
Four steps. No intermediary. Your keys, your stamp.
ECDSA P-256 key pair generated in your browser via Web Crypto API. Private key never leaves your device.
Write your content, its meaning, and your intention. All three are bundled and signed with your private key.
SHA-256 hashes of the document and signature are recorded on Tezos. Immutable, public, verifiable.
Anyone with the public key can verify the signature. Anyone can check the blockchain proof. Zero trust required.
No custom algorithms. No proprietary formats. Standards only.
Industry-standard elliptic curve signatures. Web Crypto API
Cryptographic hashing for document integrity. SubtleCrypto.digest()
Energy-efficient proof-of-stake chain. ghostnet / mainnet
Auth + PostgreSQL + RLS. Open-source, EU hosting. supabase-js
Export and share public keys for external verification. Standard JWK format.
Every domain where proving intention matters as much as proving existence.
Stamp your research, code, or invention with its declared purpose before publication. Provable prior art with declared intention.
"I stamped my ML algorithm with intention 'novel approach to federated learning' 6 months before publication. When a competitor claimed similar work, my timestamp proved prior art."
Contracts, NDAs, consent forms — stamp not just the text, but what each party intends by signing.
"Both parties stamped the contract with their intentions. When dispute arose, the stamped intentions clarified ambiguous clauses."
When AI creates something, stamp the human intention behind the prompt. EU AI Act transparency, built in.
"I stamp every AI-generated report with my editorial intention. If audited under the EU AI Act, I have cryptographic proof of human oversight."
Certify the meaning and purpose of your research before peer review. Timestamp + intention = stronger claim.
"I timestamped my thesis abstract with declared research intention before submission. The blockchain proof established priority independent of the journal."
Generate a real cryptographic stamp in your browser. Nothing leaves your device.
Your stamping history. Local stamps sync to cloud when signed in.
Enter a stamp ID to verify its authenticity, blockchain proof, and ZK commitment.
Try it: click to test verification
Start free. Pay only when you need blockchain anchoring or volume.
No account required · Works in browser · Takes 30 seconds
Your stamps remain on the blockchain and are still verifiable with your public key. However, you cannot create new stamps with that key pair. Generate a new key pair and continue stamping.
Under 5 seconds for local stamping. Blockchain anchoring (Pro tier) takes 30-60 seconds depending on network congestion.
Yes. Stamp the human intention behind the prompt. This provides EU AI Act transparency and proves human oversight.
Yes. All cryptographic operations run in your browser. We never see your content, only the hash you choose to anchor.
Your stamps are on the Tezos blockchain and verifiable with standard cryptographic tools. You don't depend on us to verify.
All cryptographic operations run in your browser. Private keys never leave your device. We store only what you explicitly choose to persist, with full deletion rights.
AmiStampAI is a cryptographic tool, not an AI decision system. When used to stamp AI-generated content, it provides the transparency and traceability the Act requires.
ECDSA P-256, SHA-256, JWK, Tezos — all open, auditable, interoperable. No vendor lock-in. Export your keys and verify anywhere.