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 0x5696e5600f75bebc5f5476bb632e5e5308d398cd5c6db03bfc87f3f949647f33. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41df0d44-d94b-439b-bfe4-6f52f4ce0001.json and https://artists.proofprofile.net/proofs/artist/41df0d44-d94b-439b-bfe4-6f52f4ce0001.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Together Again (Live at Calella Jazz Festival, 1994)