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 0xb9e31c5f7f5877fd17874aff775f58e6f507cb93f2a7fd1513f5c2b69eb328bf. 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/6b785951-8870-4ead-9873-e6394aa388fb.json and https://artists.proofprofile.net/proofs/artist/6b785951-8870-4ead-9873-e6394aa388fb.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 0xe32177c4b468d168b627cf3caf3efd4ba7e57d377497274f3ad774e355061ef2. 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/BRT2D2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420d6a4d442168e189d7e9f14bb680fece83b961407d151fd3a6b2bd0f9cfc3. 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/BRAGL1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ddfcf7161bcb427eed07a7afe9e1e0db47a248e345530e1706952d90e85bc5. 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/BRAGL1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866710fb5fc5594fc42c9dbfcce5d309638fd327d163c6dce9dc72db211b8bdc. 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/BRAGL1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccfc36e7ebe2a149b6b19940dd91bfd980974f135f0d8896eab4fae7b42a2b6. 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/BRAGL1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a17d34e96c8441fac63e8ec4ff037c89414e7618a7f2bfaae161da0705e6bd. 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/BRAGL1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aa818003595c66e8d73e50f424e327e79e551d4772613594d8416c5c799203. 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/BRAGL1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe1016f768241ae47d064229c80053cf739e9c30a6f1bd5b01c4ab4968e02cd. 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/BRAGL1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aa46fec4a5b7df243ac38f17d636db86326ff57ba700a888c6121d77bbe17e. 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/BRAGL1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b4261317a41ea229e205b07aad6a6500a845b67b82d40aa2fe63e846005bb6. 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/BRAGL1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba59843ceac963a4f24b15d4afeac9c5b539d12d400c8df649be6e8367582685. 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/BRT2D2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa5c9ba14b5b24d8254d3a3e149f709eea045dce08a196963971888cb3dd399. 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/BRT2D2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41919bebe4404bbe1f93f89253c4f613a77687e6e3c81a8a2b291225ff11d68. 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/BRT2D2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556832bfb73728b6dc3ab73ec8fdb18d2b1536c2cc30d7a1aa88d9b772e544c5. 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/BRT2D2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98124420d0bded8cd1f2254de4bbf52ca793dac5cdae3452e55130e2e32cc985. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BRT2D2300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01fd9ff4510c7cfc7e32fb5bb121ffac86a414c7b227b9b6132ca039a4e8002. 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/BCRD32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556832bfb73728b6dc3ab73ec8fdb18d2b1536c2cc30d7a1aa88d9b772e544c5. 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/BRT2D2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41919bebe4404bbe1f93f89253c4f613a77687e6e3c81a8a2b291225ff11d68. 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/BRT2D2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa5c9ba14b5b24d8254d3a3e149f709eea045dce08a196963971888cb3dd399. 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/BRT2D2300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba59843ceac963a4f24b15d4afeac9c5b539d12d400c8df649be6e8367582685. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRT2D2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d8cacaa4d6165c227aa79e215b8540a0725c0de32a4b07bd6cd49c9cc6733b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNJX2010806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e2708e40e94facc4fea8bec6e70de2dd11c81fb8f4c99c1ef696cfe6ea0014. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZGLM2054707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df6af8d7683f1c8f62fab2f5ed45e635a94f6e2b50eef460949f76fdd89e74. 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/QZGLM1951053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6f6048b6c34aa20e348eeacc41e81d10ba58c9902bd7c175838f648d2ac219. 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/US7VG1789725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abdf9f046c215ac718f6a973eb2cd0fec04cd419d5e047da15a063e62b65afa. 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/BX09G2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa1a061009c5594a2858d452dcd62d33615ed7f71761a090fa74c898ddcf65e. 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/BRT2D2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce1c51a7adade930d9527df4b3ff2526d86dfe59663dd050ea152e6c933f63a. 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/BRT2D2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8399d712b41faa1fb820e627326dfc8cb2a751b4cdae96fe51774d533be254d. 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/BRT2D2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3200071f7b2db3e84bcd1ac25aba1aa78913db6bace4aa04a861e62cd815fc1. 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/BRT2D2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e709cfb4f0bc1bfa442647c45445cfe964161708a366ca78074312f350f3cd5. 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/BRT2D2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843f55f63ac99ba56ed0140e006d37e7c53ab6bff1f58e9c099c2ac8f7a684b0. 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/BRT2D2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90f05364cbf3ed7fc29a4c9e162873e06e88065c7cdad1bce03b3afce4eaaae. 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/BRT2D2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0332e2794c0cfd5ee609f1057605dc23d19c073ab7e5e69ceb214d8b2eda1236. 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/BRT2D2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d4f257e3ad505a8fb772a7d316137b0302ed56cfe435cf3bf1239b08d0fe2. 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/BRT2D2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c82ef4b96dd5bb1b938f72335001775eee462eb76c2364cb1718498fa941a. 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/BRT2D2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b747ee31ecec5ec0907eca37ec1d5e4bb682f2490a20d9827fb9679575cc32e. 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/BRT2D2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7221584e71c1bdeed15b0a641264b2c2df14387074c6a02dc14ddad4caadf919. 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/BRT2D2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32177c4b468d168b627cf3caf3efd4ba7e57d377497274f3ad774e355061ef2. 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/BRT2D2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe988363ee7dbd49d4c3760b28a4a65b6cc50d5570d3a966ee14eaa22c257f6. 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/BRT2D2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe0d82c7989f8266159427c64b2e88272b9b160cc3c69efbf29c05ce98de541. 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/BRT2D2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7552bd19f14d1b186e79476fc222214ba22370bbe9abf62762bbff791aa7c. 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/BRT2D2500003.