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 0xc74af0df10b34a3b506e5d5ae692ce76ae061b040d0488d12a30558dc5993e75. 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/70efd724-5587-4b29-8743-875c588c2a53.json and https://artists.proofprofile.net/proofs/artist/70efd724-5587-4b29-8743-875c588c2a53.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 0x22fc83ae51295bd3e51936642e1cb7a7d7e7feba74fbf747bb31fb014ac9dea7. 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/USA371108320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7828e72c7f1a7f3574cd58dfa8792b02c2cd6fc8f57bb425c8fd1548d7a92fb6. 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/USA371108322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150fdfbc06bf82fa171bde54179eb5422d5d51e13defe2a988b4572b5e67ab74. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA371108323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746145ae02d45c12ea2baaa62d1a46942e1fa7299073bb938f618246378d49ec. 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/PTVI11000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced67bf3fa33a4c08e30d7a597e653737b0640210783d68361cb30f0ff2dba87. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA371108325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28ce6f73561134f26aa3fff95accaca6e1028e338616e01504c8534cb2e530. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PTVI11000397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f4fe38cb71b75410298cbeec13bc21a6f4485720409876042e7e66694d8447. 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/USA371108327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0bdf73f6eb49e96806dddba899ebfd0158dbd5e247095ad7398816fdcaac09. 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/USA371108328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3112912b13a94cee3e0da4cecf1454ba1fa4231590da3fdb9f012408297c80f. 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/PTVI11000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ccc7daf016957d0de1c3a8e53a51cb8c83ead7fa8fd58a4948b527dc2e7f2f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USA371108330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a575c345d0d776a5c30fe1c566fe8bdc5e106497f63bdbd6e226f3311072de7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USA371108331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67235b6ffa3bd61846810bbae78584ef8bcb09e63db80d05bf4b4cd51df2c6ec. 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/USA371108332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad502e8efa1994376c2f9f234b46c13f7a5ecb63f394406af9a600bd12f26e0. 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/PTVI11000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81641689afeb1e8bc9329fffa6f93d9b9e1cc2c595fd6f8795fccbc38a66457. 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/PTVI10900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952f6cefef16cb11a139a9276b25b78a42881e82b2d1451af03146d2dfa807de. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USA371108336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7518fdc306525e2765f47d46d0a0373a28c8a5fb3a1ae572eab0cccfc18e6a9d. 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/USA371108337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46383e504a07a0962b79e8b2e63d59904aa05dec029ee5af8f40ccdc4971c95f. 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/USA371108338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027f5e65ca18be85f61078113d115cd570de45c752c9f4f598f23a1f06b16d4a. 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/USA371108339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fc19722cc4c951d434a027958eac2704c759380bec2a2755a626ad86ac2ca6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA371108340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924614a11b8d5c38ad9ce3b6f0f68d57e19249398ddda62bb70d4e152a8ce321. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMFMF1414667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378ee3e0b1100e65928d967810a4b3263316e803c9c5ff35726ec311f32c034. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMFMF1414668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb20c17de110466c97c55df0ffc4256b4d0544e0f9f6346f065c2c90f4dd9210. 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/QMFMF1414669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b1b2d5a818a3e65e9fc884d6ef8bd4284ab1d75ccbd8cf4786b88aef687e7. 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/QMFMF1414670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713084a9f17bef419c2d64039fe830e63533dffb789b431a1a5674968ed82a6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMFMF1414671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f324aac5ea8253476d20681775ffbb23898e95d4267cb0949b1605e40abd7a9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMFMF1414672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8131ad06227b3d33ee81c02d18f2c82ef7f729e54c60aba761d20865e0e1de3a. 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/QMFMF1414673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca4af9c7b9a52d948c86aedad992d78a32c709d21bb29335612d8e05dbd23e1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFMF1414674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00540c87036b24c1c7ac1ca933f023756b9f00090249d18158e22b327ca5b6. 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/QMFMF1414675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a79b21829c7f4cd9a215e58fe96cda8f8d34fc64080c206c09695ba28f4c92. 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/QMFMF1414676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2e1db74604770721c2a033dfa9f76080a4c6c3c0d7b49e29c1ddf7fa017952. 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/QMFMF1414677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43c45c620eab0ae974dd46ffd36037a8fdcf645c55b39e64660e27f702db66. 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/QMFMF1414678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a58a40a5430054bfd41e58d78902eecdf19dc444f79bf98b6f219ac4491936. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMFMF1414679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9560acd0837f7b4c20859c991770a2b6e789e1702cbc55e8180d6fbfd3f1b158. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMFMF1414680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb49ef380a4c550a6ec8bee5f96423e818f8c7475ce5ad9211137215f0a83812. 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/QMFMF1414681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be6229653beab15b01e7175164da99f6e8ab76ad1647956ce8e0cc71c316a66. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QMFMF1414682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33358592ffac70d1b79810ff6298fe7d5ea070477ff3e70bf0b241dd849e874. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1414683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4351213132b53b881f5467dbd72b02cedf1713adeebde241ffd17db3e09f4da5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMFMF1414684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c5aa87bfc5fff30dd065d7b6e61113ef0bf3ce8a97bf23172ef4a55ffd4669. 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/QMFMF1414685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa808bd574bd017c41fa000faef9fe13292487736d7768f63379ce070efa027c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMFMF1414686.