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 0x08e997bb70cf0bf4e2ac995e17b56f9ff40a02ce321c6b58f490371adea48959. 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/057686d8-5cf8-41a1-a866-2b073158f71a.json and https://artists.proofprofile.net/proofs/artist/057686d8-5cf8-41a1-a866-2b073158f71a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Happy Days Are Here Again/Jitterbug Waltz
Nobody Knows The Trouble I've Seen/No Woman, No Cry