Certz Verifier

Verify a site's Certz certificate: CA chain, on-chain registry, and a live proof-of-possession challenge beside TLS.

Certz Verifier is an advisory browser extension for checking Certz-issued certificates. When opened on a website, it verifies: - the site publishes a Certz certificate - the certificate is signed by the pinned Certz CA root - the certificate matches the current hostname - the certificate digest is recorded on the Oasis Sapphire testnet registry - the site can sign a fresh nonce, proving it currently holds the matching private key Certz Verifier does not replace browser TLS validation, install a trusted root, change the browser lock icon, or intercept HTTPS traffic. It is an out-of-band verification layer for the Certz research demo.