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 0x0f64867ba7049df8da180b05f6a8096b9bf43eecbf56390c103891e2676bcf25. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b9b0521-1baf-4cfc-a5e8-387c13040a1d.json and https://artists.proofprofile.net/proofs/artist/8b9b0521-1baf-4cfc-a5e8-387c13040a1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ミュージカル「忍たま乱太郎」 (第13弾 忍術学園学園祭2023 -Special Songs-)
MUSICAL NINTAMA RANTARO (vol.13 NINJUTSU GAKUEN GAKUENSAI2023 -Special Songs-)
ミュージカル「忍たま乱太郎」第12弾 まさかの共闘！？大作戦！！ 劇場収録の段！ (Live)
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 0x1b7a0022f4abd10ac5c5db6e197b0d5fc5fd2e7abd1b2d693f3c99d0750a9e5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPR502206424.
ミュージカル「忍たま乱太郎」第8弾 ～がんばれ五年生！技あり、術あり、初忍務！！～ オリジナル楽曲集の段！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d25f9a05462d1e375e38cc784e43fe6ee1d61f530d9559eb10593ac45232488. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPR502301102.
ミュージカル「忍たま乱太郎」第12弾再演 ～まさかの共闘！？大作戦！！～ Special Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218085ff8fd92cbf31556da0cc70912b23505712c01651e883ff95ce242b574. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPR502301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1925303bf7a3b0a13f33c8817c7b86f02be361ed74a4f4f05549b0bdc8616b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPR502301113.