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 0xec311429c9683ca2f00f272af42d3fd2704cc1380c942aa08825bf70f3e10be1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffea8414-fe04-4518-a84c-48967e0c3565.json and https://artists.proofprofile.net/proofs/artist/ffea8414-fe04-4518-a84c-48967e0c3565.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9弾 ～忍術学園陥落！夢のまた夢！？～ オリジナル楽曲集の段！
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 0xdb47a2257be9b1925ff94a5aed008bbacd1f4a26c590e6b3248f005386bc6c06. 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/JPR502301115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a372b1a72b36701e0baff993f416f76896dbb8aeedf50de00f99f157d0bf79e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPR502301127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c431ee72af8f1093bbf03ece2da89cff0031a6f2a09db1b5eb97303a73ef565. 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/JPR502301128.
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 0x6d6f5f62d10a241fc235aec5409bc7ca8cc240ad9e0d586a49a6205f379357dc. 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/JPR502301091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65593f2c772f9efb0f2bdca3bdbd78d29e143e2975a2c02ea8bf923be685ab0. 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/JPR502301104.