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 0x304b63a35f6fceb7302eb9adf8fcece80ae6e0ced7ad56c6f9d69cf50d8a98b4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2eecc5e-b700-4bbd-8bd3-4db7e4cb66ad.json and https://artists.proofprofile.net/proofs/artist/e2eecc5e-b700-4bbd-8bd3-4db7e4cb66ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).