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 0xbc1ebc438085e8a07671894b0c55f2ec41fe8290f200db0bfaf2e99eaac0f4b6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c5e341f-abef-49e3-97b7-bafc4232f289.json and https://artists.proofprofile.net/proofs/artist/2c5e341f-abef-49e3-97b7-bafc4232f289.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mood Island : The Music of Erroll Garner