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 0xdcc69a8b58c42e666b7aced951a5c7191b930ded2066d643c01bb1452818eb3d. 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/ba74ee99-0dd7-4c7c-ae03-9fdc673971f1.json and https://artists.proofprofile.net/proofs/artist/ba74ee99-0dd7-4c7c-ae03-9fdc673971f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les performances des candidats en danger
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 0xda3f33e1f72a59271303ecc35891c5af3a0b35098632bf7f702f87a3b6ffc761. 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/CAQ522149002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2086c6d175c098b88caafba65239260210e228e22942754f6424909153998713. 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/CAQ522149007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f52697e39a0b8a8cf945b23355e6d2547bb0a10ea2062a2c414269fb6c2f216. 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/CAQ522149009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef223349c22f848e36b4abe900dd6f67686ce336e194dfbb7418608b2afcd4f. 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/CAQ522149012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbefce5f79cce8f8384275aa1d1b4a97a79b51a8e9dc24734e6ec7c258131dd. 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/CAQ522149014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ee0709d353db74437da487b0c9a3e815422c46dd26dd43656169ba290138e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAQ522149018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2beedca096b22392f768cc17b51bef89b3f577e85e9bf6e9ec8dbc2f28bff20. 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/CAQ522149022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a97f90b54ad9c7b3beb364607e48b783c80ecced5fa33a35af0bc5841f7aa3. 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/CAQ522149023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b398994eeca868cb5ffb2a70df4ec72b5c6b986e65bbc996005931a8f0b6cb. 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/CAQ522149025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f993f5ec3928ad6b0964acfe1a531b2aa4e340a3bae395606722d47f8af9dd. 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/CAQ522149028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2cf05e9cb598d67fc4ca9562f93c5c4f5f276932427d69b6733466aaa89310. 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/CAQ522149029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd88ac57cf031962dd7fb0714d947e7c677d56350045383333d047cf064dc2. 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/CAQ522149032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23eaaea06dac51e98e2351fd829d6cb6adc5eb6b90bf16a274d93cb3b328f5a. 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/CAQ522149033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b64057df825d4b17d18536c20cf099270af95b942b6d8b55bad6520903a8d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAQ522144007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f62074d5d53176249432affe931c6a66e01dd0d2d983264eac40dd0921d309. 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/CAQ522144005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a818f848dd1d80a9cec0ff89379597cae7e2a6aed117b5b15a2906b8895eab. 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/CAQ522144015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2955152dcf9519b39dc4449efb266a0b80c2e8429b7119c2edf9d874fa2c47. 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/CAQ522144006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff844e4fe6a7203e60ac14e045bb4db0b91d0fb9a97aa4c98eb97feee988e36c. 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/CAQ522144008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d8f3ba2c9de9823e2f33214d5fb98102be4490956738b9c5abe2528dd418b4. 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/CAQ522144002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ba1698e011c1f40124164c43f3d34a7bc9018c2180fb77d14dc21e33753b92. 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/CAQ522124001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8c55214a6c1991567f3e04462c52689c32884663d41c85540d81b839801ab8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CAQ522124002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb322dbac603a5a47f3d12ecfe40d309667305cbd62ea2eee323569d061bf5. 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/CAQ522124003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ab6a41da28c6c91fe7fd8355bf90c5a66a563b8e0c0dfdfc92cca6ec8ffb86. 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/CAQ522124004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785aa09e67aeb1b253bb78b2180eca93c6f458a0f319141696223960d10dda38. 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/CAPDY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e4171abbbb61c8dc3ddcda832aecdcee6d49707c536b809909c30f640fb3f. 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/CAPDY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c0b579840029b281686eb12c7e7372cd2ede6843c0ec5f8cc461a57cdb6c2. 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/CAPDY2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a06060d7c837ec8e5c6a01baab45e43a3acc6c02f00e125296c58bb349ead0. 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/CBPDY2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad221f926ec3e14054bd96871449666a052dda33286a82b42e1dff8d6db6da58. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CAPDY2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb734680cc260d85c49a0758a8d958958a2e50a95e3fb0e5ad5e774bf36bb6600. 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/CAB2N2303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21e917ec1a8a431e00e8d3ad0a0d0c9b3910ccee0ce2253bbb81003305a9895. 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/CAB2N2303006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b2036b30e9c542f1a11ed7f8ba91d56d3137239e29363751cc7b87cd78202. 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/CAPDY2400007.