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 0xec0ffd0cb2fb38ba740169a04774de9349cf3b7df10b3abbc8ec5b2e8757d8ab. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2478c871-83c9-4e10-9b50-0ea8066f1db8.json and https://artists.proofprofile.net/proofs/artist/2478c871-83c9-4e10-9b50-0ea8066f1db8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).