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 0xce4d8280f8cc44841929b4cf9350f2ee7c560ffbf5f056e0e0bd61dac9bdd020. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27b58088-0d17-4e97-af00-3ef8984fba0f.json and https://artists.proofprofile.net/proofs/artist/27b58088-0d17-4e97-af00-3ef8984fba0f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).