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 0x88a652e6d67188267d38fbc530040d958d7fbdcfb8c6d3a4ca65cc74934d8ff8. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e69a4cc-80a7-49c4-b7de-c26b3dd4eda1.json and https://artists.proofprofile.net/proofs/artist/4e69a4cc-80a7-49c4-b7de-c26b3dd4eda1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).