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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 0xf8175523b8641e7cc8c47841af4288d462a2cfefab38cbf0cb6f845a5e4916d7. 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/dc597b9c-0f0b-436f-9a16-1911206c11a8.json and https://artists.proofprofile.net/proofs/artist/dc597b9c-0f0b-436f-9a16-1911206c11a8.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 0xde91a38972e05aa2eb295a18986d148b154436beac17e3e392d42609b799e3de. 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/AUSR20800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd12b37f53a094c0904b82c087521dbb948293f9a71cb7aedab73e6a8759cc8e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUSR20800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d19ce128ccb4eb9c2387ff587f5afa6787711e01f9135a19086f3c64dfd03. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AUSR20800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af70124af747ef17a1cb3df9df89a9a699879ee5359f29c6a903d173133654. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AUSR20800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2171244117d77a6c3f4521c6799782b7fa35799115b98e8ee901acd79cb3ee. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUSR20800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8f351f6e9a7de1c29c6a19375495f8eb0b538b0ca867274bc2c1c906ebe5c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:24:02Z), 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/AUSR20800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc106b7934f5851281589c6b16ed4106254bfa10b0bbe3fbd779bdf6207d57652. 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/AUSR20800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d278b6a221b1ac73e35cd16a45cf190297eec0011e0925e16f75d787f79fa3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AUSR20800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe1242930a2544268241e76994d1e9e0fcabb964e273ea9d1d9a7f0ba38790. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/AUSR20800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7425900567378c4703fbfef9744272ebbd9989bec2a2a4c3db1e982b9482aa. 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/AUSR21300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8692436940ae0d419131d39ad2d95f1eb29ca677e5d709dc69e5f74bec7b115f. 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/AUUM71600757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b2fc9664467af4a8ecdbe07ea581e5901b2ef607ae04da701a242d24187178. 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/AUUM71600759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879162da320b4324c8f961de64e52069609ba85164aa7f669105016b9860f224. 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/AUUM71600760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaa13bf76fdf0adfb5636d82bbe15f6977e2e2a6d00d63c4fdb9caaee7c57c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71600761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e33733123e1260ec3067511d9eacc0937d54f391f79bcd76d4162f6574e1bb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71600762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cfd3768a62f62fec741cdc77abbc755295fcaf083acd44b0a801fa83b7b978. 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/AUUM71600763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d20e0008a3e9a4ad9008e09130f73f7f28e62afe5f705e5bdf32279bc604c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71700349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca00700a9cfae35c6bdfb838691ba6511974df1e3d23bd72d3328ce64b85eec0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71600765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5d449578f4c0c48a776c5f6468c05adfeeffd98a50351dcc6a5dc9f04db9ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71600766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b40466ead99ec1a58a58a1f5de193f79ccf1f0de868db38cd880fb7795c611a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUUM71600767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7e68ec3af21a17969e6ae9e46c0bff59af9830a66c9051b9b71ce1738bcc3. 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/AUUM71600768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8e9690fd014d608e38e392333b2a5f74f6b674845a48e5be0da69ef924499d. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/AUMEV2482314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc04a23c58a12923e1dcee4ce0cab2838975d9814e1026d9fbcb3a3a563db64. 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/AUOB11200905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc7d4ef44a1491a59db2ee31c3e5e1ccdeb7226b75bc6232a01b62701e94cf8. 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/AUCGD1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31c056f2c52ff588b574b77206f4ec9fcbabe29d8b34c4f2af59889e60e8cc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUCGD1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f34b9c18b68f51ccd406d4d55ec66838ee6a458dfa49610b3bc5d8695d8408f. 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/AUUM71700577.