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 0x96d4625a45dea26e3e5facaea7796ba0093877d974c217358f8e5cc4c14395e2. 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/f8445215-2eb1-4758-809e-2796a2be2d61.json and https://artists.proofprofile.net/proofs/artist/f8445215-2eb1-4758-809e-2796a2be2d61.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 0x33a16328514ed8b2449dc8637a7a8bf22130373e80468b1548a1f1cbb1fc10a6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZHN62112234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eb31ad22a222f82822bcfbdf06a24bb55eb0075babdcbf3f63b6d5a1034e61. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6J2156259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01abb7ff0854143e037d803fa02b65aa7b63519cb77c3880fae546172f4a08e5. 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/QZNWS2178976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e162c171cd7476f2dcd0d5811e24880d220e07d0745a2efe91ac44bfe23348. 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/QZES52270665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c2650c507c0b98e0a355919250d30c25827af472c96ce05803fe38900f3fc1. 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/QZK6P2274780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c86999730127a4c2909d2133ac9f16a03c694d556dbc12c5401ff52115f4c9. 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/QZK6P2274781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ca210c37ca2dc80071e83d277126adf9e7419f1cf1d27ab5839661e332ae0. 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/QZMER2236327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b74cef1b4c8dea3f06dfc80a9084b070dcc5b046f449d25b89b77c5fd50dae. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA2260889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec294227cfaf8134487979b8cbeb7f3594b06c9f96705b6b212790622b721ee. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTAY2289568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda20dba3df3898d956b4cda37ca9e23964d2375c41f8267c08f3fdb8abb0d9fc. 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/QZTAY2289571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3594493f740dd67699236ea562ba1651b8450ee9f68d8370ee8d3396e54f47. 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/QZTAY2289573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c517d84cd5cc50832318664c6e3d6f4cdd7e71a73b136f846bf826f2acdf6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB52250162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ae29ba280b8816040d0de752a7591c4ae8e49347395def005b82bd3cab8822. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTB82258570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41285fa31e0f4a97d72db299ae5b43af0e26f5a24f8e24f14c1899ad695df343. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6M2360214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a531fd6b0de36d0317624ffee2b4e765dd34e70bbccbf593f190cd3fccf58d8. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZK6G2328657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd949bd685c39770b1f6a8ae999c87f6be556c4a259d6cf11ef0f2d81a1bba731. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWT2339122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbe8b77bd2f62251365d0a80d3ae9a1f1994a873be8815b23844ffabe81be88. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZTAW2398983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d1ec6151f4650ea57613b6d51959abf4ed7eee66a62a5f536211bb667edf57. 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/QZTB52362729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf5259e4d9cc0c4c83164d9d78fc3c22727909bc483526999daf2811f99a23f. 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/QZTBE2368216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1593b5733ef19f278120e76024ea0333192df4f90bcb07de9e74c0de0c6548b1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZTBE2368217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc58be2cd4bb0976701d33eb926d86d16f0b904553c1fb536faef90cb3879bc. 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/QZWFL2354392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f33b380464730d9a99f518d3bbef5706be899dc19c2fe8ae7c9f451f0951a. 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/QZMEM2491841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53113f28820490337f067682574e2b7024e1ac2674eca0d9eb3018f07bfafb7e. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZZ7M2467713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a484d8e061e0c82ba965935618fb23b364d60b9dc0f222ad4d080a218668a84. 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/QZZ7U2451145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb640de78c381ebf340ec98fdc36cd786e78242ba422153c7490749ad7e96cc. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QT3F42414706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a484d8e061e0c82ba965935618fb23b364d60b9dc0f222ad4d080a218668a84. 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/QZZ7U2451145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53113f28820490337f067682574e2b7024e1ac2674eca0d9eb3018f07bfafb7e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7M2467713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb23e38ae8767e6eee7e379e8ab3aedfb5c4c29e1e4a00a0c914fde8bf3178f4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ32594901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4244a9a1aa22ce75f4b7141bf46528b56f39873bc53fa863745ae74068d6d3. 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/QZFZ32594902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb640de78c381ebf340ec98fdc36cd786e78242ba422153c7490749ad7e96cc. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QT3F42414706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6578abdd5c5f10e84e1442bf997e2c515c5b11d7d7c980fae660c56c11121819. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ32594903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8c3bf5d53dcd692ff12d028b451b4574a71d6b833812969572bafaeda572b. 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/QZZ772432181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0e9e1425924724a8f278ab3134e5fc7704b54d789ff4e25adf2ddc0aa12c0. 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/QZDA62545786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0e9e1425924724a8f278ab3134e5fc7704b54d789ff4e25adf2ddc0aa12c0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA62545786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b6649ce1e62d37c6f274b3833d853a6897d1cacf47f53a5a37324baa43773. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN72556305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0e9e1425924724a8f278ab3134e5fc7704b54d789ff4e25adf2ddc0aa12c0. 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/QZDA62545786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e862529f6732a760717cec4ba1dd8b4a69c5f2b16d2a7d21c1c5d8871d6bb6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2593395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaefcfca7a916de531005f3e30b51ea452a11573c0b15f520ad7f606d915b1e. 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/QZMEP2539675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5825727ce8f0fd6c8382b1862fd5057486081d7dbc203c0283b44c278870f39. 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/QZES62229450.