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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2042775dec6fc743b93214dfcbe45001b54a9def1f19051ee01652190dbdbf9. 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/b5b43a47-2d0f-4a04-b3f1-fd0086bac885.json and https://artists.proofprofile.net/proofs/artist/b5b43a47-2d0f-4a04-b3f1-fd0086bac885.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe397c45cc0cce66a74e399ae411d177de9e4a5e1a5282ff57c29ed18ec74d367. 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/ROROT2009401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb1673d59ed02cc7f9027b6d9960ba0164dc9e7eac1734b2803fc916905a86. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:43:06Z), 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/ROROT2032301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0c451eaa4692d60574020d3de30976e720adc2984c7aad2bfa297a60e5a477. 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/ROROT2123101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3228391494d3020e78776c68a72bdf4ba2f4be8d30581db57e77cc7c87de11e. 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/ROROT2182210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfef6fe42778a78d401113a6284c45282a26b2630084ca24a3a4d8da44b5f72. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:26:04Z), 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/ROROT2204640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf4c22d5ebf1c83d3357875474cb23667a181849a65c6e2b12ab152490369b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ROROT2205120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354903220bba4bec8d8f6696b7db3f6a70f856314c35500e7f4af6e9e716a07e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ROROT2304732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ee6068793f7aeff37bde5d035825ad8d567e55e31bd062f4bd516145d98f7b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:24:19Z), 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/ROROT2304735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2fd7e6c3bb1bd5701fa428741d87d318ee7b3c83c8beb53bb3ab9fcc231d01. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:38Z), 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/ROROT2304743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928529563b099806fd09224a2dd12700678a925071aff7ad699388629c5c8f5e. 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/ROROT2304737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f989b861fb27400dbbc203b9f5101d3bbb322055f128ad703e37ec304147abe. 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/ROROT2304738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2840a97e08cfcb98a50172477f380cb175353fedc980ab9d2ed8401846dde9d1. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/ROROT2401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4f8e86a111accc605404b041f312576a84b655ac7771b8e0f52605daf21cc1. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/ROUM72500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734e7e546b013f93580898d5ff08004adfb0b31c68775140138929e654a40a58. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ROUM72500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d92763cf66a8ba6655b9a6f0447e77f50875bc8ec42bd337c381caa64800ce9. 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/ROUM72500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d1fa327c2b4f572aae69c6cf33e69756cafe125f00052b3f813e62ffa2c9a1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ROUM72500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023b5ad684140bcde3560ac2143b27bc0397177cfdc651ab7862b350c3aa483. 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/ROUM72500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133811e59802f4c4c580b4759dd26493ea31f36a2dc06b9a728e75fb2048fcac. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:17:16Z), 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/ROUM72500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db34e19c4e550c87c0bdf77321227586d6c74fe588af6bbb8fb09a603ddec62. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ROUM72500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af3f6dd523b9f7f7db2a6f6c60c07e1184ee37ce028f9abb44c0b608dc798b3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ROUM72500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb15f70162257f9eceb2eea142bff62a4717be6a83f7ffb46778212aa3cc08. 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/ROGRA2101625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd349a16839c189201fcec00729e747b6d468082751f098d01b7e81de14deda. 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/ROROT2055301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2947618a8f4c300a12e0aa2d2d4955bd4208c78026aa904fd1edadb4187624bd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ROUM72400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ddd651593a83f041caa920a8ce535380062fd550d4f359a69493c10c27b26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/RO2DY2300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08655022019f401aca949ce962fa7edd055768e74ed602a59980d1cf7570a8b6. 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/ROROT2118501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8301b8dbbcfd55141b5d33e36ab00c6d6a7d67f2eb77733ccc6e57edc7b15e7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872236365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f07696da9c8bc893311b01f7bd3065a0ebfcd4a4198dc3b31b314ad0dc60d3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0Q2423285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b91a579ba1f0c8b4a2d69566ed7088123dc0ce635db221330f8c9633ac370. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEY2041009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b91a579ba1f0c8b4a2d69566ed7088123dc0ce635db221330f8c9633ac370. 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/TCAEY2041009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd30ee1972ec1d11136c827eda2407e4b6e57b2b6c745eba60380b327a5061. 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/QZDA62125385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa8f68da508b6d50f534a254eb09faf4cde2993943e311aeeeb47e949c33096. 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/ROGRA2001076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd9e3d65eac07a2722f12e989f7e5d8fc8e57f19f0208949285265160d9702. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:33Z), 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/ROROT2118901.