Prove file ownership on-chain. Drop a file, get a cryptographic stamp.

BinaryStamp lets anyone register the SHA-256 hash of any file on a blockchain, creating a timestamped, immutable record of ownership. Verify any file's provenance instantly.

• One Screen — Drop a file: if it is claimed you see by whom and when, if not you can claim it
• Client-Side Hashing — SHA-256 in the browser; the file itself is never uploaded
• On-chain — Stamp on Base (EVM), Sui, or both at once — signed by your own wallet
• Walrus Storage — Metadata stored on Walrus decentralized blob storage
• ENS Resolution — Every stamp gets a real ENS name resolving to its owner via CCIP-Read
• The Graph Indexing — All stamps indexed for instant lookups and history
• AI Provenance Agent — Ask questions about any file's ownership chain
• Ownership Transfers — Transfer stamp ownership to another address

git clone https://github.com/binarystamp/binarystamp.git
cd binarystamp
cp .env.example .env    # Configure your keys
./_start up             # Start the service

Open http://localhost:8082

Stamping needs a browser wallet: MetaMask for Base, a Wallet-Standard Sui wallet for Sui. Your wallet signs the transaction, so the stamp is owned by you.

1. Hash — File is SHA-256 hashed entirely in-browser (never uploaded)
2. Check — The hash is looked up across The Graph, Base, and Sui
3. Store — Optional metadata stored on Walrus
4. Stamp — Unclaimed hashes can be registered on-chain (Base / Sui)
5. Transfer — Stamps can be handed to another address
6. Resolve — <base36-hash>.binarystamp.eth and <number>.binarystamp.eth resolve to the owner

User drops file
    |
    v
SHA-256 (client-side)
    |
    v
Lookup ---> The Graph ---> EVM Contract (Base) ---> Sui event log
    |
    +-- stamped ------> owner, date, metadata
    |                   + transfer ownership
    |                   + AI provenance agent
    |
    +-- unstamped ----> claim it
                        |
                        +---> Walrus (metadata storage)
                        |
                        +---> EVM Contract (Base) ---> The Graph
                        |
                        +---> Sui Contract (Move)

ENS CCIP-Read Gateway <--- binarystamp.eth subdomains

Logo (512×512) and 16:9 splash screens in assets/ — dark and light, SVG plus PNG at 1x and 2x.

• Presentation — what it is and why, in a few slides
• Quickstart — running locally and stamping your first file
• API Reference — HTTP endpoints
• Deployment — production and contract deployment
• Technical docs — architecture and internals

• Website: https://binarystamp.com
• ENS: binarystamp.eth
• Twitter: https://x.com/binarystamp

MIT