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 0xef18addff8da933fbc5c5dd77548f70641a4738c3a7a6f18879198a867311f10. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5bc9b74-dac2-430d-ba08-6222e83c25cd.json and https://artists.proofprofile.net/proofs/artist/c5bc9b74-dac2-430d-ba08-6222e83c25cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Here You Go, You Do It: A Crywank Covers Compilation