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 0xd1907cd91eed30a895e9d30c59ae83cc41f96f63fcc53c9f2604158abf5834c3. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c5d336c-4457-4eb4-acb7-77a4cebaa0ce.json and https://artists.proofprofile.net/proofs/artist/0c5d336c-4457-4eb4-acb7-77a4cebaa0ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).