QED Proof
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The log

Every receipt is a leaf in an append-only Merkle tree (RFC 6962). Its root is anchored on Base Sepolia, a testnet, through EAS. Nothing in the log can be edited or dropped without the proofs breaking, and anyone can check it: no account, no key.

Current head

Recent anchors

Each anchor writes a root of the log to Base Sepolia (testnet) through EAS.

Entries

The ledger shows hashes only, so nobody's claims are exposed. A receipt holder proves their own entry with the receipt.

Check a receipt

Paste a receipt id or its link. It opens the receipt and checks it in your browser.