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 0x76a9c24873571379adf791823ded29c2a38b7b9388e6382fa4806a72c195de29. 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/071849e7-a227-4d6c-a417-764eb15a393e.json and https://artists.proofprofile.net/proofs/artist/071849e7-a227-4d6c-a417-764eb15a393e.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 0xa8bb06736b41726bd725345404a085791185dce3cfc3a51be9d999ca4e60613b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPV501000869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00157a8d8382a5b0f3be6df1f6da8d7aa733a2b5b6b299d3d5fa6413aaac9d26. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:19:29Z), 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/JPV501000877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17449c2fb0cfa4547be49e634279950deed6a2d6231e685986dc993aa87ab8ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPV501000888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc4e8583ff11f3fb5ff741b49f73b174390762aad0793f3d348e1158d9b789. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPV501100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bb009f0f5ec4b8cf1375882be57a2053da00182fe01a30b5f490d082a52296. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/JPJ901209360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0587a76222c760a8f78a6a4585fb344b937a0e757af300ea020b7cb4baf4c5. 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/JPH491501045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61b94e6278aeb92562f821c9dde57aea9bc04d9e6f73f8a604643b3d3bba9c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:54Z), 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/JPWP01571293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b93aa0a1dc821ae86c74beb960490d01d54deef1e789f7b3f48ceb2dbbd8fd7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPH492201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578d9b342e4f235185f90c0072ad24c5aa8b8e922a97105a6d3a74cf919646b1. 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/JPH492201082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65721032553f6bfcbf1872bcc78d6c89b103cfdd7730f1f5a3c246dfd32ee445. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPH492201223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250f5803b5eb727aaab2e1dd9e2696d2bece072db046d846f9244be502e59bb5. 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/JPH492201224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a22474422b185c6d1d3a7c5546b1fc0af16597bcf862e23a23554b7c98d93. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/JPH492201230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dbe12ba121b4999f0e125db066920662f1bfddbc9dc87b946e54160ff02217. 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/JPH492301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc75f61e47f4a3a26b2defe525645ac8c089b8b0a90ccb231544bba61b169565. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPH492401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378d9d7227806683f1fb1fd854707106618a965a30fd9a533c2257f3c6aa773. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/JPH492401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276265eeba1e1b3b504afe638565eebbbfe0fc47e2af501e8cd25c919a6428de. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPH492401026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f68bc01f3c521d5f581b74474344c2a174f2bf78d1b6b7699c4fb395ac19e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:02Z), 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/JPH492401063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249bb185f5587546d614018c681fe3cd90c2326443594e52be8113c696020183. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:16:58Z), 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/JPVI01707180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b6bf9855822691bbe6ced10c886f78322e9aca088e546d1a9cb02e5c38e4f6. 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/JPR502409052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0587a76222c760a8f78a6a4585fb344b937a0e757af300ea020b7cb4baf4c5. 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/JPH491501045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae4d03ab5ac2268d885bfb2ee4603b4d4c126b0657373d7af5ffcea93c1fb19. 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/JPH492401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba974323bd90320ee3739b651739e383740bc44332a07348d58390f23b021e18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPU902105554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22743eff9db24e4de20b9268bbab611d6d3a281bade9980a3144d54129ad5ed1. 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/JPU902205110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a588c54948b64d259f652e70a1f7120879c6ef2a1adf2fe773e4ae0b6de827. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPT561900004.