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 0xefb02f54789a522e9dfff1919a61e70363b54c4ad7e0e460793ecc00afc32248. 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/7ad1a124-494e-4a01-adf8-da7197bcfc9b.json and https://artists.proofprofile.net/proofs/artist/7ad1a124-494e-4a01-adf8-da7197bcfc9b.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 0x281b129f08778d90fa0a6aaeda12324111feaffa660b6806af5ee865516e9abe. 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/QZFYX2079217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017dbad7f0e1527a863c7a901d07fcac26afebca159f8fa2b2dbbd0305271002. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM24S1833234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5152d4184f02fda864d3a0b67db15e67952e9bd6125755c9db20810e05b14041. 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/QM24S1837805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a56c297958e31d85a17519b28114d013eb48bf85a862a67c96e9404dfe7812. 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/QZMEN2054020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad64c489b23c416382a908868349064e05d6d7aff17bee3d0c1e9954ab932ef6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBRKQ2190117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7841e387d07711442dee14109235fb62f219ba2c5a0832c9944e8c49a466cc. 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/USXG92200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584b3cb6942dc8b6129d3a281903b4a77f3be03eb93acb98913e3cd19d1d020. 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/USXG92200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd72c958b204b9f23cff2a495f0097a04dcc8f69d8be7b310db633b3ecbc14b5. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USXG92300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354e24d969c5c63b7d26d8d02292f5e87aee47554ab43de2be8441818ba71d0b. 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/USXG92300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae81306ec1fdef9c569c950b29b9a1c8ed996714e6a2ee509803ff089b12b330. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USXG92300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6f7b05e5c556eb6de9be66dd7294ed82276fc5aa31e8dbff28d42f75a999c3. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USXG92400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa602a3a9ec97ab9b78d773d1601a06ff2bd9cdd7272f5d4824b1a1f1342f9d27. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USXG92400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e11cb5a73f7bf7ef10de52b24da3a10af0acb20876e1b0538fc9b00242f4bd. 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/USXG92400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9802db663869601c22879e3741b32fcc8b7d1ccf29db1ef06ab018cf13144fbb. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USXG92400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec42db414883c93400afb4a2865fb94b6b47386744c976976178e4452fa29ecd. 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/USXG92400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a9befc202dd06198f50fe286277e55c8f9c15566b0cd0b74393c0f7d9406d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USXG92400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314579d7e571981ec13c566c54c005e2cf5210e114fa9743f81720e8e9f851a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USXG92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b12f3e59492e772190ed0d943c687e92587c6fc238ef2a67ee11d6602b7d8d0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USXG92400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d29a93e120aaa7d74a85b0cd5e1b216fd3c3de8e27a92748fc5b45a1bc4f4e. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USXG92400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58a7e5456e49ed6bebf544237267ea3090562e73baf514e3f72dd5f21c93d25. 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/USXG92400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b368e30194317d204567504f5f2050aaddf7388c9b82d2926811091fcb87e. 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/USXG92400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a4ec33edec81361e4d0da002324cc14231133782800896237d69fd51971b6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USXG92400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727031c422c00f07181f474aa2ffcdefe23a3ef9bd1d11ddeaca508ee78e9265. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USXG92400721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c236b06bb150342022269f1706d09221e3a5ae464440b12328aebdc2e9b132. 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/USXG92400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727031c422c00f07181f474aa2ffcdefe23a3ef9bd1d11ddeaca508ee78e9265. 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/USXG92400721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff4957b2760dc80ead63c6ff0a9280f55553f23617c16f26ac2a3e244d19cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USXG92400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b863b7da18806f4db55d66681cebdf376963b4d2839f8d49c8a72147ab3b51a. 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/USXG92400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a4ec33edec81361e4d0da002324cc14231133782800896237d69fd51971b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USXG92400727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b368e30194317d204567504f5f2050aaddf7388c9b82d2926811091fcb87e. 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/USXG92400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b477bde039cb9cf1977734df743f81bd8c6e8ddd38a45274d0e067220046570. 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/USXG92300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe719ca1967b18a05224ef4b9792af8f7660dccb4807f0a06ae3dbb738dd0548. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USXG92300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76010894c1ffefc5e1b159ef407eb2d10c9813dfebf0b0e9aee6779939b25417. 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/USXG92500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299a3b042c63596b969a674005b438148907e551b302a8e93b6d8ce77f599454. 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/USXG92300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f15f82c99dee46e9926b3b8f87b40d0859856e2d62e5d92accd2da7d06f9a4f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USXG92300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742440d5c66acf0c586b4e1bd404b6d363638b516f63eb1064df9081e11ed2f7. 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/USXG92300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b477bde039cb9cf1977734df743f81bd8c6e8ddd38a45274d0e067220046570. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USXG92300505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe719ca1967b18a05224ef4b9792af8f7660dccb4807f0a06ae3dbb738dd0548. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USXG92300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e6e5ee09e9c7e8614b3bccb7ffad4be5b353e3e93a74790bf6ff8a8ff22adf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USXG92500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd740935c87eea53515b09e6476f285407b010f574c096f2f4fd4fc2d470aa43e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USXG92500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa330a32bba464be0bdf19b237058a3d7140368af6ab512fb116dd7c85237f1e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USXG92500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457a496bbb4afddb767e849db1d886032dbcdbeb375357eb473fb52e8c01d9fb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USXG92500540.