1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f91e71fbaa72aa2438cd9aa22228e5ac35c968ec91299d90e9537c591ef561. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9c695dc-d3e2-4b63-854a-971131ee6930.json and https://artists.proofprofile.net/proofs/artist/e9c695dc-d3e2-4b63-854a-971131ee6930.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sanity for Summer (feat. Justin Courtney Pierre and Sydney Sprague)
Sanity for a Summer - Audiotree Live Version