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 0x517606b073c6295ca338f04faaf0469cbe51917580889b0ef7ba9092c94454ed. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20b709e0-2315-43a0-b928-abb2ad444d9f.json and https://artists.proofprofile.net/proofs/artist/20b709e0-2315-43a0-b928-abb2ad444d9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
柳家 花緑1「七段目」「笠碁」-「朝日名人会」ライヴシリーズ53
柳家 花緑2「祇園祭」「高砂や」-「朝日名人会」ライヴシリーズ81
柳家 花緑3「竹の水仙」「二階ぞめき」-「朝日名人会」ライヴシリーズ97
柳家花緑4「ちりとてちん」「蜘蛛駕籠」-「朝日名人会」ライヴシリーズ109
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e0613a1a4abac8e3b60add54b61a14fa8ee2abc00f2d1afe16cded37db60e0. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPP401500376.