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 0xdbb30dd44963466ddfff843b64a0ece826dacd36d88e925e28ead249429d908d. 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/1823e8e0-058e-4e2d-a6d5-2a8f96813c6b.json and https://artists.proofprofile.net/proofs/artist/1823e8e0-058e-4e2d-a6d5-2a8f96813c6b.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 0xc079fc51298b1422980ac1ddf50ff5fb6a285709d934f2935863a74726c3a073. 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/USYBL2201477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60afec01c793d55e166f1058de5ae34bb5315d62993a8dffd6172f473260cad1. 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/USYBL2300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f1ae2fa9d32344f7a096409ac0993692dd312b067268e98f45715b6e937c8. 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/GBKPL2282621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212702aeb30d15ddfe907d7d78a29062e1457a39b9e9373a08245d4f5b422f7d. 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/USYBL2300419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3787420a72d8fc41da72148143cea51c4860b0559d1cc0aee4c024441f24997. 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/GBKPL2174377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079ccf101aefc36dc8c4e3254edeba31d545d49141bf070e7b1ed8533b06ba5. 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/USYBL2201034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097876b4b5bd85b51dcf7929d243711422eb71a32d53960d9ee48ea0fd833f25. 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/USYBL2300421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079fc51298b1422980ac1ddf50ff5fb6a285709d934f2935863a74726c3a073. 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/USYBL2201477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e55faad4c7c54e96ec05c008b668f0901652fdca87661c88f7ed61d7d548bf. 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/USYBL2201884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454cccee828c7d999be1fb63b1c758c13f541afdc98abea1a89da43d8f96b7b. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:41Z), 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/USYBL2302056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cefc120d2aee994ced03e410e8b65837cbf01a9cdf72516a704ce9a7d97edf3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:53:12Z), 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/USYBL2400705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32cd934657fc5f9570664722351e5bb31110d2b260f07289e6e34a968ec6815. 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/QM24S2504450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d89bf1f5740740c510c29d5ea9fbc23b361af9f1d32454751d1170f6c6097cd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:36Z), 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/QM24S2502432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d44e8d0298fc4db502bb352aff0f5b3d529536cf811fb5bbb0fdfc3c5acd85. 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/QM24S2504449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37836a0bd2dde00d1a8fd1d46ab2f2bf8ab7b7182cb26c8a30e91ed57ec7bcb7. 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/QM24S2504335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ffa616e1d4ec391bb9f4cbf4de561f8831dfd5cb744cb13ffb04a1b5f0cf88. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:49:58Z), 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/QM24S2502881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0225d9a3ae827fed9ecc132bf678f82f343e3611d6b5f329613a4b64fec68d. 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/QM24S2504448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e7d2201b277a36c5f0c51ba422df94a14631d3ce94874cb052e38191e78e13. 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/QM24S2504447.