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 0xa0865b8dc6c8ff05543579e67006ad9376376ff2a70d58aaf975e9327ce2a3a4. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/812f9c3e-9e5c-4961-895d-fd87ea6b9122.json and https://artists.proofprofile.net/proofs/artist/812f9c3e-9e5c-4961-895d-fd87ea6b9122.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).