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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6494b4f3b0cb8f8101e3bf5329c262b5a2656cbff387f4dc67f99fe665c8a78. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bdeec21-7c53-4cac-ab34-bbf53d8808d4.json and https://artists.proofprofile.net/proofs/artist/9bdeec21-7c53-4cac-ab34-bbf53d8808d4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).