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 0x3bdf6b3e08c0d4cfee95a13bb1d2c54ba7d9c100457d65cc406632b41f939d85. 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/a7ac7f2e-0638-40b4-a372-0cbd5087c640.json and https://artists.proofprofile.net/proofs/artist/a7ac7f2e-0638-40b4-a372-0cbd5087c640.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 0x35eaca7b6d6399f3c48b88b1f840521e0bc694d06b9c2dcc2e0b3e234e1e035f. 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/CZA232000708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a8bbfe1c2b4bef86725423874271cc51279b9f0ac2e7a02465b5eb325f993a. 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/CZA232000647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077ed35c34132ee8eb09d2aabd4ad13a35e0da8576b134028802518bb9699090. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/CZA232000648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a9d4875204bf6fa0c264dd03b6ffe769a5da580691aee3c32dfa10961b382. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SKA012200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1802d074f714f05dac99a5642f465d57c61ef71efe13e281a0e72744ddc5e76. 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/SKA012300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45fc183785580d6513f75550c11ef27c5e304830956173831ef3d17e300a5c6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SKA012300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1d07adacea762fe3783215a41709a892c32afdf9f83a8521687d96f8fc723b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SKA012300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f7da22310c7a84748a26a4d1ede5027edb104e71592987ff5032611969def. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SKA012300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911b8abf83147770810463146fcfdbe9b8171c974581494dd72e58bb126b65b6. 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/SKA012300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc396911f6b1ce8235f961f066dcf7a5b2c3ee645191753b197e81ba567f76b9e. 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/SKA012300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb386d5abf54d0a0fe2072fcc4397cc0304a2d31e66ff8a23045474172c28387. 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/SKA012300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05558dc51dcaecb3c4d74c2ad1ade7261e2012314fc7a4659e6831389d1c8b7f. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/SKA012300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f8247a98abba555717090662b60ea0d27b9f74e8af346f4e8f57a22131421. 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/SKA012300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36886aed652d07f96e7746754e9de96e169efe93842a9876d65a31206becd7. 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/SKA012300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f8247a98abba555717090662b60ea0d27b9f74e8af346f4e8f57a22131421. 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/SKA012300369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6a53355f8a76f67faed29759766db1d0c1a47eae5500f7ef04e787d2abb98. 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/SKA012300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ccd6fbde1b7fd32bd32d32a50e47def6593b442d40b7afbaae810d3ddad857. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CZUM72400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0d26ebfe66b81da411a8e44905c4f1738f9f238467e053b774d94ef2cd73f. 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/CZUM72400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449c3a414f6929aca7046884b63ea4e721896d50b945bb9917117fb2b0f0b66. 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/CZUM72401116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8525432493413b162564598f0998d80dacff3f7299fb7d5f178ba1da9860c. 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/CZM901900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70398765ce3fbb9cf5ecab8e3d1a6e764f8d0ef3edb5eaf00c3e91860319aa22. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZM901900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aed2456e6f8824ed28cd5608b3fdcb4e32cf3b5410b7680fa3faf39e430b18. 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/CZM901900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d6a01cac65da73aed4d3610b98fa436e55c20f7d156fd9ac92e2addad37415. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZN882185223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695c907186fcde75c2fc1e830eabecb2af311baaf127bba6f9416e885332656f. 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/CZUM72400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb6a1d9e232e00aff21b4f1087fd9155c122b1ad520a744faa60f91543ccf97. 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/QZZ662348204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd24d273f20e181f0ab7e04618f81c84985c215e7894487437a8b5e8d6041e2. 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/QZN882081410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6debfba349f22d7e070ece045ae8af3022a7c48792e54388c8d277c1eae48038. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SKA012300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd229f9f9a69c6c589ca54e44695378b1437e529a3572412bd681cf2296b359b7. 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/CZUM72000518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd6906b1bb3865149c2e109b1946d26223ac2f804468f99733f327d41143e55. 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/CZUM72000533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6260e53722387635582e067b016de24322899a0306caab51ab5330a66d3317. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SKA012200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf6f380e708128a7a4b1fc0d10e5b4f81ed10c070a048397646865f6ce91927. 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/QZZ662492270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dd29f67296516a07fc7bf848171be100f4bf1926d9d8d74353c97702dd0325. 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/QZWDW2208863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745360edb27de9a2f58148127ff475debaabd5acfb4a7bcd0f999d755c9f0ce0. 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/CZA231900561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70846f2f0adb2a5960d271b8d15cd59842fee10872623afee3d0a643aaaf02. 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/CZA231900562.