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 0x66844281cb6354f1d4760c0ec22817b626e11e27eb96306d22283b3b07cf6b0b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a4f57b3-5623-4a0b-a6f6-51d6b6547b3d.json and https://artists.proofprofile.net/proofs/artist/5a4f57b3-5623-4a0b-a6f6-51d6b6547b3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).