Mandate

Public tool · no account needed

Verify an evidence record

Every purchase made through this gateway has a signed record of what was asked for, what the store's page said, which rules were checked and what was paid. If someone hands you one, check here that it is genuine and unaltered.

Drop an evidence file here, or

Signed by this gateway

Each entry carries an Ed25519 signature. It must verify against this gateway's public key, published at /.well-known/mandate-gateway.json.

Unaltered

Each entry's SHA-256 hash covers its content and the previous entry's hash. Changing one character anywhere breaks it.

Anchored

The gateway publishes a signed head of the whole ledger at /api/ledger/head. Record that value today and you can later prove the ledger was not rewritten behind it.

Check the whole ledger

A single record proves its own entries. This re-checks the full chain behind them: every entry of every purchase, in order, back to the first.

Gateway public key · Signed ledger head. The record is sent to this gateway to be checked and is not stored.