Binary Stamp
An on-chain provenance registry that lets you proof that a file existed, and that it was yours.
Binary Stamp
Created At
Winner of
The Graph - Best AI Use Case of The Graph (Continuity) 3rd place
Project Description
Most disputes turn on sequence: who had it first, and has the artefact changed since. A stamp answers both, for a few cents, at the moment of creation rather than the moment of conflict!
An on-chain provenance registry. Hash any file in your browser, register that hash on an immutable ledger, and hold a timestamped, independently verifiable record of authorship, with the option of ever revealing the file.
Applications of this project range wide and deep from simple proof of existence to proof of provenance and/or authenticity, and intellectual property protection.
The idea/project is to achieve this with a simple drag & drop!
How it's Made
This project uses ENS, Sui + Walrus, and The Graph.
Files are hashed in-browser and only the digest is registered on-chain.
A CCIP-Read wildcard resolver on mainnet gives every stamp a real ENS name with no subdomain registered, but a SHA-256 hex label is 64 chars and DNS caps labels at 63, so we encode digests in base36 (50 chars, fixed-width).
The Graph indexes stamps and transfers, backing lookups, the ENS gateway and the AI agent.
On Sui a stamp is an owned object that genuinely moves on transfer; Walrus holds metadata bound to it by digest. EVM calldata is hand-encoded, so the frontend ships no web3 library.
