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 0x51aa558afd2f5c03d47c9dc51efc26af60d96a4ff08b0db5ea0090b25d74da68. 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/eea15358-38a3-4540-ab33-0b91e6edc569.json and https://artists.proofprofile.net/proofs/artist/eea15358-38a3-4540-ab33-0b91e6edc569.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 0xced91810d2f8c07c18d9b05713ab48b52639516d7744563d4d0d0f0e7c0ffa1f. 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/NZBY02300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe305f0092817247337d8fa7becf9b769362173ec2cb431dd68c1a24a4f133417. 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/NZBY02300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe473dfaa2b8fea25bd9eb296899d3dfd2040a8215e3794ea41d6632009ba71f8. 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/NZBY02300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb0732f376c23168444d45080308d8818dbed493b1e8ae0c0e3251543e2adb. 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/NZBY02300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce81a1bfaa0ec068d69291ed7593b12ad323050f1330c93182e0066fb9ed2b9. 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/NZBY02300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3a8cf19300533bbe13eefd49545d48a755ae95b8542e2b38afe234a46d8c2. 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/NZBY02300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e46ce95f2dedf76e3af0cb9545afda59ad98c09e46447528eaaf1795ed798f0. 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/NZBY02300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6ed094b81c7be985b90978d337e7dc839e293f53a4d340f66aca5598cae6c3. 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/NZBY02300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430020a4f03fbe2efd5183248f4f1af0b1ebc2e9308e3a74b54815c7e027ca1. 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/NZBY02300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f525186d781fc598c55e8286f6257bd832263864c624a76c535d9617cc0da0. 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/NZBY02300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d6cd87c76fe6c075e356ce1819f2fe90b39c212b410ca7360a3f2e5eca8b8. 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/NZBY02300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840d5d9378c952ab4fee9429340b07d28177e1bd683eb37a9f70295ecd7f657. 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/NZYB01800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840d5d9378c952ab4fee9429340b07d28177e1bd683eb37a9f70295ecd7f657. 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/NZYB01800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b2e68375449e894a41e67d7b5bb8145ba62a1bc8664cb85c4a9f0c8630f6a. 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/NZYB01800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533ca6ae043594b488d939babaa4d81815a66237620d418a98fd031a9d45d6c9. 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/NZYB01800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8706720dbe6b5abacd7222705fe0da5c3245ae39a4ed254d59e66e8e220e2. 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/NZYB01800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0499d0584b6d965b6d6b87f9cf3c7e78bb26e5b1d224f000115464b29d65697. 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/NZYB01800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b4e5401b9c73fa4ea5d960152826023160795c2226eb7c1da26495cc5fc871. 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/NZYB01800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bc1c89a9bea85f88b43c7f65483d1c5c5a58749815c52b0b317a29ca55690c. 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/NZYB01800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8c0818d8cd7bc275c524af4d7444fbc0c28bb4b66607d7caf56d8e51f82c9. 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/NZYB01800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b208e3bb61093d5b36a5d225667edd18226ea66fc8dfec8c6f8088cf77722bc. 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/NZYB01800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b08fccd7d93a88a847b63f3a9e05e29eca5fd112fc12981995f785ea5ac790. 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/NZYB01800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30627060decab2985f721d8cff950e94a8b2b1da167103f08b0aed7f9db6c61c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NZYG01200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6291023653e02dec3f76a7a3a054c5b6b0e8064d5abfdd4bdc4492b0c6bff89. 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/NZDI11000052.