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 0x76972b4594aaef0f4b598b5e407e5e6d0869bb9a0587d479205ac332a7e18b1c. 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/84d784bc-26b2-49ef-992e-5422ebcbad3e.json and https://artists.proofprofile.net/proofs/artist/84d784bc-26b2-49ef-992e-5422ebcbad3e.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 0xcddbcb903921cbe643f26b761cc8fc678d3a6a6c65acc51ddbb69529af1c89c4. 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/QM42K2056444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c1f03e70e7b850d4a8a5b7fe7ad8c2e681428a26a4310051be258f60c0fdb7. 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/QM42K2067747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f0b614fdf5da0c5371189a0a3a936f515ce937e13873a4c17e3ff23cd664e4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GB2LD2010008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e6828330fd0d0c0cbe39f1c0d30bd3d7dcabd7ba7a4a211fba3b6cd9e7ea2. 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/QZMHL2086508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713e8e1752e3f45749e7c2bb34b2db1f2f2459f6c52a9935f22e6f7b6826e49. 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/QM42K2192063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad2d72bfc15fa8099551940dbaed8bdbbc3fcc65f4c6f6ceacb30aba96b473. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB2LD2110094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bcb0b2d8bb0a5c2d23b3a95f002c0aa0dae65b5f97bc781eeea1454f76b206. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GB2LD2110142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab12fdbaaab9bfe5c2d183f8c147d1b56a278c42357a374d8dc37385f8638e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB2LD2110173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8673d17592d361646d9d56461b8ca16f0754798e05224dd6fbd4c2a2f4f74eed. 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/QZK6N2197467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5aef7f5e28bfe25597b47c367e70fe289a00c31fd79083426b3db32b360940. 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/GB2LD2210071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5aef7f5e28bfe25597b47c367e70fe289a00c31fd79083426b3db32b360940. 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/GB2LD2210071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9463434d17491945476b97ce87044bc1ea9aa18312fc41fd9dd3d3d3e10e56c. 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/GB2LD2210051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd3c9c97719f1afa9cb64c5a76dcaa34a8c7b92faba80f870e90cf035d62ead. 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/GB2LD2010211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235a74db87250a3a4885a3273a69ea14e4728d15c2efd7744357a67ef4b6dbd8. 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/GB2LD2210013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf5badcb04f0dd84f65374f5e35f22856da5df68c6d8d01b2f59a4b4da4cfea. 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/GB2LD2210120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46275ab13124ef38e710e5a10a468192947f30337ce291583e3d9a220a642810. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2210121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4de7b0422c733960e7a3d80a07a10629ecb88ca44422046328f61f0326b419. 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/GB2LD2210000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571931103134903ddb4a0e07e1155b41d120cd47d03e18754c9dad8cb85a0cfd. 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/GB2LD2110249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0f4f60905bd1332a23bb74f0d951ee5227167bb693f1f5035ffab54a70b9f5. 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/GB2LD2210119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f6ba96c2537dd6a6e1885d7a9d31b91fcecbff3af539551c5918c780d97f1f. 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/GB2LD2210244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df7988d43320478d1eb996b46939aa33b36b3a55547a7c8e7fb8e41051c74e. 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/USA2P2316973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6764ddb7f87c8209498980b64ba93f1f3bbe5326476bdafea8823a1477417d15. 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/USA2P2321423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18048fda01907da620575207f71d53eefdf87a474cc77d4cfaf35125663756e. 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/USA2P2331026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d2288549191faa5c7d14279c3798a175b9ee521ac5ae0e2bee3f9023bed53d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USA2P2335873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd490ea0dc32da321fca4ac0e0ff48c9155a07e002213c1e5476ca26fcc1ba55. 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/USA2P2335876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18048fda01907da620575207f71d53eefdf87a474cc77d4cfaf35125663756e. 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/USA2P2331026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641912e522bf5e4a11647c37fd8b0a43ecb0c465bc3788ce80270723759e766b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USA2P2436692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd3c2a086947bc039a2a9980036a6dbf1ddc94a3662e0ead648b2c876579d27. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:08:40Z), 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/USA2P2436693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ba5602e1aa551eb3f30f1ae413e2511d31707ba33348e3936cd02fb04be1d5. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USA2P2440626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e61606767b99b4d2fcecc337d1be6e71ed8536a6e06b8348795291a9cd11245. 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/USA2P2406565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302cecec307b3a54f398eea7110d0b7ad68bfd19f44051d9212be5bb4a94f64b. 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/USA2P2463139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bd2911643568abac7596c4d0a9295472382e44d842e6bce0e5c6648d9d9123. 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/USA2P2513978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b4612debf2bca8b5502bb8ec642f0b04b07583e962bc9b90bd660db3b51741. 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/USA2P2513979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8b4a34a7e226862a7bd5edd9e91e0cadd00f48c94e703b31d9e706a7dc0c01. 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/USA2P2513980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66882360237a1095e3d4dd7189226291524d56bd445f9f340b50dfeb73eb9b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM42K2195018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2c28e977d9be330639f4ddca1321ce90a0f3e1062cdfdd74d9908a5ceef3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEWA1910065.