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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2501758d1cbfd37055eb2c589651c7ef4ca6bbe67079c9554270f7c778739. 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/JPPO02104358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ab8bf68bd5d142cacfea4db6cd1761effe7df8a7fe02011efa917f55371ccc. 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/JPPO01801632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfecc1352e892c4e4e1c581807efb1f1b4b8efb440504c4aca7f495d195088. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPPO01900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86bfcdfccdde1d9d574afc75aa3b21392b03157009973da7d73a5462ceb4e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPPO02001279.
君とどこかへ行きたい - つばめ選抜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd1a81002261de17fd07cdeeb7022025654681c52c0347e135b6e9fc5e3224a. 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/JPPO02101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c583798a78e69b42c11ba401d3fcc026121d0da2e8d5b862b15ef1c7afb554. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPPO01801634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0878e6036cd504899b131f178643fbe43375e3a0cda7de7b02960fb8e2011c8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:18Z), 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/JPPO02104361.