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 0x455f36d2c22dbfe6d5a24e541bd665df77962ea6baed06af85db1ed5598cd0c3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2ff0114-b01b-451f-931d-4c2b947b647e.json and https://artists.proofprofile.net/proofs/artist/e2ff0114-b01b-451f-931d-4c2b947b647e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
魔法使いサリー - “フルート演奏”ボーナストラック
桜咲く - （with 郡山市立大島小学校 合唱部）
アイシテル feat. CLIFF EDGE - （non stop mix Ver.）