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 0xb00b872da8b61b7412ded535e59e65e1232d7b300311631fbc62c776ad2f3ff6. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/750c91e0-731c-4de6-9c97-28163f3df49c.json and https://artists.proofprofile.net/proofs/artist/750c91e0-731c-4de6-9c97-28163f3df49c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Flamenco Masters, Vol. 1 (Pure Spanish and Flamenco Guitar)