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 0x10465cb70251222675706ff63c0e7c0cb8aad195e38a5372815e5a3b35eeaeb6. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/302882a1-cc56-4d58-8931-4522740dddfc.json and https://artists.proofprofile.net/proofs/artist/302882a1-cc56-4d58-8931-4522740dddfc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
おめでとうクリスマス (イギリス民謡)
イギリス民謡, ''グリーン スリーヴス''
ローレライ (New 東京混声合唱団愛唱曲集)