What this actually proves
A Sonodrift certificate records the engine version, seed, and every board setting that produced a track. Because the engine is deterministic, re-running it with those inputs reproduces the audio bit for bit. This page checks that reproduction directly. It re-creates the audio from scratch, right here in your browser, and compares cryptographic hashes.
- Re-render: the audio is regenerated from the certificate's inputs and its hash compared. This is the decisive check: a recording swapped in from anywhere else produces different audio when regenerated, so the hashes will not match.
- File match: if you supply the .wav, it is hashed and compared to the certified hash, proving the file in your hands is the certified one.
- Version: certificates verify against the exact engine version that minted them. If this build does not include that version, it reports the certificate as unsupported rather than invalid.
Nothing leaves your device: the certificate and audio are read locally, the engine runs locally, and this page sends nothing to any server.