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 0x5348602a76ba560b4440e51bd7baceab0d70dfaad45f8a598d2f4299f26319ed. 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/ac70ac8c-9e68-4398-8104-a4f6c57df5c7.json and https://artists.proofprofile.net/proofs/artist/ac70ac8c-9e68-4398-8104-a4f6c57df5c7.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 0x0482db8408ecb95ad4e3d78507f4e79531a304b163fdb4ec9e5dea9c2bc7a9e3. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/FRZ338702030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065b238e6dedd961e2fc882600f3eb700e9be59f10a1e9a51f0f77256b91e3ec. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/FRZ338702040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380cb93a463c78e71e337f51a79a505a9d8cb6bb9253c1d1b75ebce66755cfa4. 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/FRZ338702050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26567a67107e97b8ca168a903240d80ef3b25dab033bb9cca04aa5d574be22a. 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/FRZ338702060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a9a58b80f82e1448b62520c4a0adfc9d9335bf34bf693de744469739ee650. 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/FRZ338702070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54952c791365d9cec583b9a7a7c102b2b932c6fcca8b8f3e57bc0451cf3ee8f5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FRZ338702080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b7899be3ea2d5993e5ca54c3d05544c0d919b6e228a8136de48a13e78f8542. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FRZ338702090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb9b79a1577186256ad78bbc41ed5f806e6c31ce7ce3432fb9c2d0d2043149. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FRZ338702100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e3a11d588fb5a7bdb4a896dd3d027d1ac5be1626bee4bedcaf104213cb924. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRZ338701010.
La baleine bleue (en public avec les enfants)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4884c07eed5546342e46e1ffc6434c01dc429d36f5a3c7152c0e0a8ec3d2a9. 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/FR6V80803494.
Chnoques (Musique du spectacle de Steve Waring)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cbac540e5606e9a101836ba707298eb3588ca490103a8cb68d7f8ccecc351. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FRE411100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72972e9e5236e2ce094b0e3fb52a0adf8bd683f148f7f9baf0ffc01f99e25d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRE411700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993332f4cf1d4bf43b1f5bb8949688ba8aa3a026c94b8f4cc25f4cbf3a54dbe4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRE411700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51699d9bbbf14d7ef8230b59e89734ba8c5a893abeb8aca0933d31f8d3b6ca7. 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/FRE411701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56464ad0abf1c68d683a26f0338ff7785cee6c558d63c76db053be81ce40cb1. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/FRE411700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ac781a2ff4a6b2439e8bdcc63405a9fae23c8a2513cb911eb6d6775108d119. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FRE411700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6a36a64a8568ef5d484e33dccda85362eeac64e73d942916b84760227e2121. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FRE411700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf416b6ae49c5c8c67b0e7e621cfb2583960c490f2a94ae9c7cd2bd042963248. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRE411700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0c0d1b9fed109873b034764bb641f7aae8ef4fc2181a362ab62aa18e926d0a. 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/FRE411700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72972e9e5236e2ce094b0e3fb52a0adf8bd683f148f7f9baf0ffc01f99e25d4. 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/FRE411700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f03248986cc0858ff38461edd325d13effe1013f284babefd68d73ac8483cc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FRE411700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118af1af6cb0a5e96afc205bd5a22cd68062ae687d779076b0e3b309a3591db0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FRE411700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9150a9830b1b68b170fb6a99740027118efeddabb2aad3f14e711eb32f361335. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRE411700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4dcbecb300cec8b5ffd67d4109f36f0a239a5fa624c97f48716fffd66bc018. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRE411700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b386445072ff500e1700ec0bc7823a168bab5b3fcc6305fdbd4105524e032c6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FRE411700160.
Chansons pour mon bébé (Ma discothèque idéale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2799d7a5939d4c64edf8e842ccdbb1e12c36c3bc9c6f5f3d22bedd0c3978b747. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FRE411100100.
De l'air dans les mots (Chansons pour pas grands)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04adeff5d748506bc9f56961c3df55cfc7e0add8c11cdaa4d547589ed02a987. 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/FRP402400250.