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 0x9d22d2617161f8345b477a5ef3dcd9a39a4910c741554e39ee37a967bcac2a27. 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/fe6935f2-355d-4155-b1d0-10b791edc54e.json and https://artists.proofprofile.net/proofs/artist/fe6935f2-355d-4155-b1d0-10b791edc54e.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 0x65b113099237863c602eef5de3a7133231dddd8151d63994df194264420f3d83. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN72097303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfbb0d4974adce7070f524af8abff6688a9fcfa781ea9ec55a6d1520946c3a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN72097305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7c468be7a5d278f3f5e04b0559c43c1621316bae6eaa6c9b126c10cd23778. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHNA2008893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3efe2d9a539ab1469aa15e9983af8444e1e4f067201062a9620a4e5b6c97206. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHNA2008894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf989f3153a63c6fd45343eb91cf14558a2670469b168b3febbbb4d486361ae0a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHNA2008334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450671fce68e1e5431bb2559a8dcb3737789238fc70f7184eac3b02e0393eafc. 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/QZHNA2008335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa254b48e26d8e856fea529a05325c6ee243d605fe2fe4dc4a4fc265cdeb21fb9. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZHNA2008340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcbc6247e540168e533c780009597cd8abada948ec03ac4568f6dec3809a279. 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/QZHNA2008346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8232527372cbbbb8236a83def9ed9ff6b54279dd238df13726d5e94f55e2394. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZHNA2008348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4989f60bffdd55bc4cac7df0fb58dd5127e59244e583051c76177da01e5745. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHNA2008354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ff07682029801cd259bb70084bacd18a9ff0381e4d463f602fc035f1b670df. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHNA2008355.
Parranditas de Oro (Lucio y Tomas Pacheco)
Parranditas de Oro I (Tomas Pacheco Claros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e5f4394ceb95e850908c953146096da7c0b3adfac644bc9cf376ed94975a00. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMEM2067435.
Parranditas de Oro II (Tomas Pacheco Claros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e39483c9c4835494f14f4e1330d9800c977cba5843d38474e8d1b2cbffbdd9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZMEM2067436.
Parranditas de Oro III (Tomas Pacheco Claros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286133cf2f0e62e8ebc062d979525e95fbc99fe261d6359d2e100927285de91a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZMEM2067437.
Parranditas de Oro V (Tomas Pacheco Claros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab2737fa6838c24dfb50dac730ddd004fbb3085ad0e5e009a50a94669e8d065. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZMEM2067439.
Parranditas de Oro VI (Tomas Pacheco Claros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a39fc3d40de7a3209c6d7c42fc47ece1d93fa4b3ab75e825e20e017e14fc60. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZMEM2067440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1de29afbba4373ec0a00aaaeb6d39f84214de475bfb61e88ba42a88d7c4b3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZMER2463385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239eb709d90881880308e497711330bc60da3b945954a999682dffaa97ce92b. 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/QZMER2463388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6490706a75158600864742b806143d66826c386cf35b5f54efcc38ebdb98a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMER2463392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab7dd9849a0502ab654161b408d3dd4e5a56fdf1bf30f66b9d45c8b4e733a65. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMER2464532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bba6c8af48fba7448c00e959e7ad98461d83d8e466f93061d53627ee6f905ff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMER2464535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eddd161c183100c1a5415a7871d27ad1289c0c3a528960d1d12a9a50fb46db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMER2464537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd261414f5a78f17f986db901191eaaaa09f72b582baa3f8627bd07f14f141322. 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/QZMER2462163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46809797edc9da3d9b87974afc53147259727fa76b8eb0674dd6d7c51a72a05. 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/QZMER2462167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b1d5847ec237513ea4118b79813fa372916abc4333c2ffba0aeca253e91a7. 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/QZMER2463404.