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 0xd179a2b222667f885dbef681d0f641feceb028f9f8f9e1bd1874e204948e60c4. 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/8afc629c-28c0-4cd9-9178-e0b3cec58cd9.json and https://artists.proofprofile.net/proofs/artist/8afc629c-28c0-4cd9-9178-e0b3cec58cd9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x7944942aa023201bb5c73ac724575429174141b8f3f74f9577955fce9505290c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082100245 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0705cd4ea46e441c43f710cbaef5c54045802b09d690f2258b674268c438c224. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHX2493784 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bfcdbbb49e1c5a5ff585cb0d26003a120471b05e85f897d685d4e27d6767a5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082200900 — a six-check JSON result.
365 jours pour être sage (par Mortelle Adèle)
365 jours pour être sage - par Mortelle Adèle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d7d391caafc60d709f3741ee2fb797058c17b4cb61b5af17dd230f7eb4d718. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082200811 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30202e173a03c9351c23ac9bcbc3e01c4c22cf9a977247dfef2e623e3844d3f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082100243 — a six-check JSON result.
Debout les bizarres (par Mortelle Adèle) [Adaptation de « Le Brio »]
Debout les bizarres (par Mortelle Adèle) - Adaptation de « Le Brio »
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94866bf534f4e9eedb8fb9f94e7d0f95ac152573d0af2e1f8ef9ff0bd2325a7e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082100240 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816d0dce7266faaea6afe8f64f0dadb770315a542fff80d5ffd1adc44ef8ef91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ082100236 — a six-check JSON result.
Bienvenue à Smartville (feat. Aldebert, Bénabar, Leopoldine HH., Alexis HK, Maya Kamaty, Leeroy, Mathias Malzieu, François Morel, Helena Noguerra, Dorothée Pousséo, Sanseverino & Tété)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438694 — a six-check JSON result.
La Petite Sirène (Bande Originale Française du Film/Deluxe Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30b81506dfc5fffeceb13060d7db5c16839d248b68bdd3b07a9ed91fbc0076. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWD12326323 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4212ca285e706d341ab6582e74b40b4b789d5bcc2c8c79be9b62be1b44eac1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USWD12326324 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438694 — a six-check JSON result.
Voleuse (feat. Aldebert, Leopoldine HH. & Dorothée Pousséo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657b56ed70f41539743b8a3978e74bdd636a9a4557175168c99bed6a898bd0e1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438697 — a six-check JSON result.
Le plan (feat. Aldebert, Leopoldine HH., Maya Kamaty, Les p'tits Museau, Dorothée Pousséo & François Morel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba6b4ba902c1b1667fd4e22c9d4426b0be654e08b9e83637f50398b9fd35ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438700 — a six-check JSON result.
Dans les rues de Smartville (feat. Aldebert, Bénabar, Leopoldine HH., Alexis HK, Maya Kamaty, Leeroy, Mathias Malzieu, Helena Noguerra, Sanseverino, Tété, François Morel & Dorothée Pousséo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21eac81b1e89bf463b6aeac616ac997d4e6065cf5a1ad2e9433201b7c974ccf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438705 — a six-check JSON result.
Smartville (Rose & le jardin - Version deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507407ffd54d1905d2993abba484ea8a0249a886981ab4e39696785254879aa9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12438694 — a six-check JSON result.