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 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 0x21ff2b9c116d31bd95d4a8ae786eed9f06c4514792c7e75f8c4bb9dde63335ad. 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/be15e241-b111-490b-8ba1-edf41f6cf288.json and https://artists.proofprofile.net/proofs/artist/be15e241-b111-490b-8ba1-edf41f6cf288.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7775072e5cc5d404a74ff9b4e40a33174a62901fb900ad0efcfb3d27c6d698ae. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/JPCO09434770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fdabc6b8fa14d91d45ef784ec1ed6d5d53e50309b2c6f21d39317ade895ceb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE08693360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa045b2c4573ca75a5c86cd83d90bdec79a4c0b1a94d0d19f80a3e6444a1a5c69. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPTE08692370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec673bccbbf2a1fda9612fa3215d7d699623e95a0140fd128069fdb6886d7f75. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPTE08693400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28493f5c503db45aa6c1979dec546521b651ef1ab0b6b80ffd5fafd1a087602. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPTE08692010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f34d87934ca781e9a66e868bb7f6e2f18b1c055e24d7288ccdbae88993b44. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPCO09503470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd3a0559a8cf9300a23b24043635c1cee23f1c2a4a737fcc2ff60c5010da727. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPCO09503460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cff69e252f46ce53aa6a898d19db774664f521dd608c937ce33884a75cb48c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPCO08749210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150241614d6f28ea34147b191d0a620cfb6edb9b7d680a27ed708f38993e5618. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPCO09503570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992c680ca3d1645fd87a97c97870e233f7d49f86e9d6788d6c0ddafac4098360. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/JPCO08749280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052d9861bd68bc8ba81f62ce9aa6f76a2bc67f8cfe24da48d383ec23aaab173f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/JPCO09503600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f55f2525af24fd4aed5149d138ab7b3442d7c60bab6c54bcaebbf9c06c893. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPCO09503500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551fbb4c5ac1af33bd9408e26cad2aeddb0182d0a6d819ae5515c0ee69c4247d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPCO09503590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6e4d8946f6a825d519e1fde305d6d48c0a1da92979fa6a473e433545113cb8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPTE01210350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f33359c940ac011b60b7d836e6b01d2eca1a32adaedd8d442bb98c2bc9a65e3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPZ991500397.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6498d8f11491bd3af0a2905059578eea1499080c73b95ad3e94829b01169de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPN351700023.