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 0x4c84d5141f4ed136ecb8cd84bf594d456a703e44a09653adbc3013a81bcec6a2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/037fe6d4-0c63-4a60-94ef-7b60fda3cec2.json and https://artists.proofprofile.net/proofs/artist/037fe6d4-0c63-4a60-94ef-7b60fda3cec2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).