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 0x4965fa9884073e81f4e8e9fcc02f8aa1a253d984fd6ea970ef2c014d4e4588b7. 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/245c6586-7a5b-4823-8072-b7f9ee99027e.json and https://artists.proofprofile.net/proofs/artist/245c6586-7a5b-4823-8072-b7f9ee99027e.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 0xfb2365b40f472610257448511f4e627cfee97fbb9b748e1e41511b5d5d05e6f4. 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/QM4TW2363606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a705dd008ce52dc5a4e91d513cc7a175fd8e213bc223cb9b60f6bdc63665aa9. 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/GBKPL2293010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c8624ac0186147634a136df3741b86901b0d624a84e11e7108f589515fc33. 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/QM6P42325563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abc5e23a3305e158beb276a65253792e60e57f4f605c7c8e69ef39bb5d5c083. 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/QM6P42325565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e42d03d2eea2634f8080d27fd2fa87728dfec70ded0e97cdaebbc46937c84b5. 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/QM6P42325568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c387784603eb7a487a3655521d0ca2691974708a47ba498bb09d104d7d0655. 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/QM6P42325564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d490df31973338711c834f426489d0aa87e1518e4f708dcec7c60747730d3. 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/QM6P42325569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b3346b690b4fa82b26cc429c275bf309ace1dd8ff38b4394b6f2aec399e2c3. 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/QM6P42325571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788d81f24907ca4358aa2492ef9bbb90d9bb1f9e527929432664b6d76128a2f5. 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/QM6P42325566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24793ce7ed367171eb7cccf817c11e737303774f14d72ebfc617f5da11e7c755. 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/QM6P42325567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e6e1331b97f93ecce6c2a5337d9e05e6cded6ce9c1717543cac79b102d2bdd. 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/QM6P42325575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0a624b6d92f29c2022a90c85502fc1b400f03902347cc7af0ae02d9b64596. 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/QM6P42325576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1ccce23d6edc34c7ec4a437245d68da7a05c95a1449f0abf3ec3e7ad3ed960. 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/QM6P42325573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8158d25c9809e36461de7569dd26179061e9e1b1c34d5755fa927ff54d8255b. 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/QM6P42325570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98afbc3c6f6fbee5c26d7167d330f74e0e1f78d813399ee17dccc6147cd7f9b. 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/QM6P42325577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5443a5e9302b938ab68c71e5a37302db42b9d4e9db35042ace9ec90fe3a7de. 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/QM6P42325572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ce0d1089800634cc66df24b52387c22c12f4613cfe7cb9f5357b707058a43. 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/QM6P42325574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7cab79584b90177f21f0b561f0183a06d35ed4ee476cdb6341f837f06cfa3f. 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/QM6P42325578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4d3e77a79823f96673643007d18809adecbe0d87a37ebc0c80c7db00a697cc. 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/GBKPL2204393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f447f0a0d33b9f5af763c0a5f0767f8c40517689b4e889580da83aca7e0b797. 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/GBKPL2204395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b9426ce8af6027e38d7f7a12d9762a8d91968b3ff6bfd1d7ebe535025e0b95. 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/GBKPL2204386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e1739820d4e70fc759dbfadaaea2c18a53ed12ef8dfb5955d67d37378f8321. 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/GBKPL2204391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29781f87ec7607dc0074cf2609873e882cd99ab30db5e05177d980f2566c5f2d. 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/GBKPL2204394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a705dd008ce52dc5a4e91d513cc7a175fd8e213bc223cb9b60f6bdc63665aa9. 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/GBKPL2293010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea44d162bb3c6d988640d0640cf6689015992410abb42a1c1a153d96c9062dc7. 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/USCGH2231866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89db5df91846df119ce310bce5aacb971312737bbfc51baf3d3c79136ea754c. 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/GBKPL2204392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4003ead0158fdf41ea38ffaff01504b269b24bc75d41bb594e4c4c40708a505. 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/GBKPL2204389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9205de4aba59e8edf53b44454c45fcf386f7b67fc051bb5c11a85a42f2b2498. 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/GBKPL2204385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc203c1022c06fe21530c6c2e3e495d74bdc0291bcea99824345c80fa8bee36b4. 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/GBKPL2204390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6ac40555e4fb36bad4dd9c1b347120c0bef6c216859726be98ade78fc53c7. 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/GBKPL2204387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06672dc8d829a9f352cd9773bcc034a967e0b0fb83d40796e470c2119a14d43. 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/GBKPL2204388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a074c919ca8698882fb60e787c0e83e7a963ec883bc18d12699d639a1b7d3. 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/GBKPL2204397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25bcebdbae6747d28b7b3e95aa7d391f3cd44796a4165d3238e7ededf5a8347. 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/GBKPL2204396.