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 0x3d5e1d8adb2509339add4426ddd038ef1b5ac423780b520751aeafe177ce9a46. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5f9138c-06c9-4ae4-ab47-eb1dafff4921.json and https://artists.proofprofile.net/proofs/artist/d5f9138c-06c9-4ae4-ab47-eb1dafff4921.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 0x00e551196b3b544bee5a11ff83c7b45545073bd170cee7289b666b3a20bd27c4. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/MXG701900230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398a961220154790bc2defbdacb3a9c5b33ffc227ea103b76b80c5c79f6c7ee. 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/MXG701900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2537dc88b2af6def3bb96269f820d33ea133dc32e337dce15955ce27d9ca5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/MXG701900242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f86738886d39564fdd5d7d4a7965cfa6d89987bdd87839fbcffb948d355789. 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/MXG701900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5093fa775ae4f54df52e2570b74edbefbab86959484835f6e969c8d907d8f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/MXG701900245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4adbd3224397dc9b553f51ec418b6f789717fddd8caa4fc91f63b60c3a421b1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/MXG701900246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28095ed9aa2657c597578e75ed20ed24c994b411db8f2458e17be4ab25106e65. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/MXG701900247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc15ff3db75047012cddfcbd2a67424c860379d22305ed255f4f73357bc224. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/MXG701900248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487c33535e8b5747ac7f3e2fb71987d9b3d72a2ae3cba87c180e3d192a597d27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXG701900251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33c124a7457d75614a4f4bd4cb6e80bb5eaac94075156249d4642a3859bbe7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/MXG701900252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12f54f3ab133db7884c9548cd1ad94a9dde21bf271b5bca0b9020aff0e534f9. 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/MXG701900254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afb9c4dbbead97c9aa3cb1d82e934fb8f2805ecab9714f867174071f9ae769f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/MXG701900256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e9c76f334a099c169ea4bc76193f6115e98a05bb3cb1ad6821c3d0b256c514. 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/MX2832401543.
En Santa Rita Juchitán Oax. Parte 2 (En Vivo)