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 0x20634cf7e70a76081931552648a159f37c028d196a236f9c135a9c2263168688. 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/57bd58ba-5a14-4a04-b171-433a0bbc0d1e.json and https://artists.proofprofile.net/proofs/artist/57bd58ba-5a14-4a04-b171-433a0bbc0d1e.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 0xc52bf9c875e250559e8308c6ca6f8c94994c85f8a9b979f159395dd079e19223. 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/TCAED1964504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc9584d0ddb91e88040cdda336eecf1e7c170cc9938128eb5497f7d7d5edf0e. 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/TCAED1988147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0383c39c2d64525ad3a5eea4aa493ce4f513ea38ecd680f683f74efa18e2f5. 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/TCAEG1950510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee5e94b93a246e0bccfca780dbc6391e4b2cb043c5d75fd67b41bac7bbe6ee4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEH1984303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8170a44791305b93b72e7153e3a99ada66c5d0236eea031f838dc1e48d18f5c1. 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/TCAEK1962208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bf7e6f0d65e62088aef26e78e71d9ae4374d4c401af9a1ed36227616bcc22b. 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/TCAEK1962002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0c53069c6066513daa0371d34972af271cbf79853f0bf619b9fd9a35efa6b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFB2052062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69aa7970a2c62631a0994b0e649ca941779fde942c5fc86c521b252dac76d02. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFZ22189230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694b8b5a56d53335d3e611290a76e96779b33b1c3a33e91002c56e0b41008869. 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/QZFZ52146773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed80675867f59e16fe68a843ad1a19a114118d8484381d51e58dca4bad7da992. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ52147064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa70553f5778e27538fd972ae58f6a2e0a6422767b9d463f07ae00c2a8be0d6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZDA42158869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c49d353fe858fbad8b3d7752b658822e217b3742c151c38b91fc52771785473. 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/QZK6H2126475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894b9e49b4582450b48e7c3249e0270d3b75832a5924c4e6715e44d47d20a47. 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/QZTAZ2229864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9bcd10d29ef2318c519dcf41fd48cac92e3a31fc304b9c8fb9a14c9da61e8a. 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/QZTB22216535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92075cfbc1e02e3e7b519b973cb466f45bf7bd718c6a82aa2c83dc3e80fa9d0b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWR2383878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe460faf8ceb5e5c6f32e4bb18d81edee8d739fd55f10fc7cbf9771ddefdc6052. 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/QZWFP2359390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c067664c3c9293eae579814d52edb8b611e6293a202dac782948858a4861d57. 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/QZNWV2404135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064ffb212d70f4ac28a7e49739a1126d9c08f6799a10509b31d42cddcc7d40c6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWV2404136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e971effe3d65db373adc296e6ab94729812cd494b2fde1120713e08d2b67701. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWV2404137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720db18a920076c77de74ffb0bd6fa18a55359e7a43729ba435c71093982e7a2. 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/QZNWV2404139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddf895c8faa89eb23d56e73a3490f386cc6da90b7674ac48ec9a476b676bd3a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZNWV2404140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae2a2438bfcbcd15009e71a617d974a25c5ce464cc9ebb5d667118e53c0a66. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWV2404143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d19db05e32315be6e36e4c2e71ae2ae6ab125399efe168d46b6ababb2342b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZNWV2404146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25f3294f6e572ac43274638a2a144232daa2726bd36536ccf6863b8535bda22. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWV2404147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7c700a1b69a595b6f20c19269d9ebf3745e98f1e34f469ecf271f55bdc4fa. 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/QZNWV2404148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6ef9232c81decabf818d3f983b0e7e39ef6cb46495508557def872e6fce83. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZNWV2404151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a1fd96fbeaec5f0fe8a7430ecdb5990dafc34e0ddd35b96b44a4b9907ee91. 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/QZNWV2404154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ac9180f8fe9baf29c657cffc07386776cef46ce4b4913c18ecad5f5290a046. 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/QZNWV2404156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212475a38a80b5d944c4d5489fa5f870e4ca279532443e343d0fd91c4eb5e783. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZNWV2404158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe79244df967aed616481d3fbd14c2c9cdd211f582d5f54343bf5084ff2a16f3. 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/QZNWV2404160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0307f3569ffb7a0fcd297c93f7668fabca95e5a95bc0397d4bdd50f169d9baf4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZWFH2463835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a027e425e8289c0eb4a774f8738e4d4f6b72c95306728ad69a71cb4e067306. 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/QZFZ62577453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1386fbe9c2ae7c5166d97ef1a1b024319ae4e85023d162ce334ee090619e9a. 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/TCAHD2320580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a2f2e246c8649455173258dfdac953b60cebf40dc7b7a4dd074e1d9afb7d80. 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/TCAEG1950315.