1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cfbed89e7d2ddd7c3224bb1ba2b22a83ad645d73683d7c8b2894f0377847ec. 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/3c38d85f-3d18-46ea-b1b1-80a53e1bf62d.json and https://artists.proofprofile.net/proofs/artist/3c38d85f-3d18-46ea-b1b1-80a53e1bf62d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nana / A Woman at the Sunset [윤수일 4집(나나/석양의 여인)]
Acacia/My Dream is You/Farewell Preparation