Z2 ZI2 Verify
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Public verifier

Verify a ZI² Certified receipt

Paste any receipt below. Signature verification runs entirely in your browser — nothing leaves this page. The public key comes from /.well-known/zi2cert.jwks.

How this works

  1. We fetch the public JWKS once, cache it in your browser.
  2. The receipt's kid field selects the right key.
  3. Web Crypto's Ed25519 verify runs on the canonical bytes of the receipt.
  4. Match → the checks in the receipt provably ran. Mismatch → someone edited it.