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 0x2adc7e96bbb270614c2e77bf98b008f50c84dbc65ca8ee15201a23929181d593. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42c1f9d8-6e2b-4d32-a416-01c8dc0c8fd2.json and https://artists.proofprofile.net/proofs/artist/42c1f9d8-6e2b-4d32-a416-01c8dc0c8fd2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).