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 0x5e180978be37601ff95232ddf9d27e9079e67002eb2ca37c86d726fc312cd438. 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/46f0be5f-031e-4378-a7ef-6109665a457a.json and https://artists.proofprofile.net/proofs/artist/46f0be5f-031e-4378-a7ef-6109665a457a.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 0xd67172c066c97a67a9e64b465cfe4d12351e6c0e1af00676a8fa640f90f6595c. 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/USUYG1388801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32450f76d9867810ce14e1f2c7fbf5a553968cbe93916558dc9e00c351938dfe. 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/USUYG1392729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3969dfb11b9e1b98266fce044e7180d9b6a5582568b0745ddad0af47ed44011d. 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/USUYG1395964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bfed2b34cfc33677803db234e88e3e3aafe741521875b38ad88f536f795aa5. 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/USUYG1378821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd282d3b0df9e2a35fa27bef6ed9aaf4f6288fd91064cd8938ecde068f9805a. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USUYG1442632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f5c8309164755c3604d323c5794a764a607a77a1cb06d453fdeda614dca3d. 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/USUYG1442635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bdc81a08129190097f8ad0882f1e9abb3e827bea1c5f2694219dd358bae698. 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/USUYG1442636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cd93d340332462b43cc5298e6c6695b39f9e7989e4515096539cf406378ea7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZR8K2348000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1617731c398d6d71dffa06102d13bde3142b5abeff6ee6723ebe34fac4e8c830. 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/QZR8K2348005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697b48e109c548e2c087687fe582cb7890077d26fd7437b6196c30be0a803138. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZR8K2348007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fe17b350331415d06d46e172f75aace805972ea40c11c66b5aa477c94fd9e6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZR8K2348009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc689aeb9a779e9c69e6b2ba09bf534cfbbf4f983566c2c2b5fb0901e87fd96e4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZR8K2348010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda797b19199719e5b9a20c45fefa87e100f2dffd79fb4f3ed48f95d57f384a0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZR8K2448015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd72c88dedd8892956c6c3436ea486051c2400995956b8c3e1227cee1567dcd. 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/TLVEM2473391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a91ca411802f9086ace87a17b8c00a4e2b9e6f196f2578033afe564f771f9. 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/QZPEW2523601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0358d569db4da6cf3dd807bcf18b136de9169666785b2adf3419cbf0e5a45e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZPEW2523597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c5eb51d2e4ae49e233514b9352931e37ded54ef5060ac1d04f308a78d2637. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZPEW2523599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80d2ed3e76f3360404989186ea5067175db16272e1f3db8c3c37957a9d0bedf. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZPEW2523603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed22e59424ec7a35fb240c568272910b4c32a264a34bb9599ccc65badca9c29a. 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/QZPEW2523600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623a31833ba6bef16e2ca9c41122da62c6c038e34b4c589cd872e486695741b. 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/QZHN32573729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5238e67d09b73aca6c2a43577da9ec0d848885956f9946fa694a12c372f2c5bd. 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/QZHN82588109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5421b1cdd8a2e3ce81e02ab2177cf968355e7efd9b56ed5cc89a4c76b3390340. 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/QZHN82588110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490920a2afa768170e2aaad4d4a99b216f7116f07281f109c1f2a24877112487. 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/QZHN82588111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646851d30f23e86eb55fd861dbb7187bb654ed21e7aac5c7e42e0a0271490f0f. 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/QZHN82588112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96f3ff84908f4e306fb6af411590ba8cd2fc3f34f56ff7675895ea58c8bdaec. 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/QZHN82588113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb35644220e5d35b6feaf5e4e061f606ee8e5624f5b6dd687e26e05fe282c94. 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/QZHN82588114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57cb34df4117e5d07445740476821588ddc2e99c4fb550d1ab87479a552ab91. 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/QZHN82588115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0086134159163044c94f30fe2c4b2a3353791c4351a12e42082468e08be0e494. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN82588116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392753f32a38ee2d390a1f58ef2756bb371c988969b9eb12ef32a331a37eed64. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K42586451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5465a7bb10daaaa374e92ffa7ff5a6e007e00decc81b39333ffc78ed82241e37. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT62U2591162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c298d0339b4ac56e8e2cf6d0696340763c98d11bbe33260b02fe31e13a0af. 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/USRC12202828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6c298d0339b4ac56e8e2cf6d0696340763c98d11bbe33260b02fe31e13a0af. 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/USRC12202828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134ab5ab1c13edc051f3d0b8755b5fa9853c206040100d1b19b753a6309801f0. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZK6N2479445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad64d81d9b38fe45a18cae8f82c9f0ddef49d5b2cd9fb3b75159911c9be4a71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42053538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731160e59873ad79eec31fb60838c2446c296a896325ec2956176cc8a1cd016f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ71910502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeea05580621a23b42231deb758c4240e9fbd0017f64c31a597b17f5eb504c4. 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/QZK6Q2190343.