thumb|Image of J.C.Petit Jean-Claude Petit (born 14 November 1943) is a French composer and arranger, born in Vaires-sur-Marne. After accompanying jazzmen in his childhood, Petit went to the Conservat
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14296b9b6b6d6c30f21bc0f675e926107f4c467e9113e8258d7e10d51367b68f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0851b56-2535-4d2f-837e-8b1a13206e51.json and https://artists.proofprofile.net/proofs/artist/a0851b56-2535-4d2f-837e-8b1a13206e51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jean de Florette / Manon des Sources (Bande originale des films)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267c8203a67440a2b0cfe013e5c3fe9762a57dd7f750471c6a77c61d2596298. 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/FRZ668601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e74e34b30c3a4979320817bb22cb1a6c9a779bc73ad8608e951ee2262e92311. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ668601050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e81ed5f2bb651c0315fe06f63ac9108dad23ac16480f8ffefe699ba60f0964. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ668601060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337588979f79146549c91c7efb827eadd01bd8aab045fccc05a0519b7e185ceb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ668601110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ee25e0f9bb366b15db77c8ade31715e680b03371b5dab0d4c1d34bf158dca9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ668601140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1af21a0f42129daa135f7ccb3fa7de009dec452996294fc2be60f3e049ff2f6. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRZ668601170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436e9b854f635f520f3d6f92deccbd56fc4e216fa87cf6e73a38ce9bc11b4855. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ668601270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0450ec967467296bcc8d8f184080fdb2985f366e803c06e37d4aa412a13020. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ668601280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee33c929e42cd4a6e658ba9057a687e93a363a3334a08a393e69ebb38f2b18a6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ668601290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809091e83f8c387319a151ef0ad75138acd05826e62c0f0e55ed11e95b20cc8c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ668601300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de5eb74f30e90651727c9ae4a5f4bcce94a76150c6f4bb1bc0435951acaa0ad. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ668601310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b15fe6f213982208c5b1bdddeef3f5adebff25fd3e007ee4aa02529864cea1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ668601320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96db4176d43a902162a4b2b56be7f07d0a21f993b8903755a846de84f7ddbd7c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ668601340.
Générique Fin - Thème de Jean de Florette d'après l'ouverture de "La Force du Destin" de Giuseppe Verdi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f99becc560563641b58cbb146aa42f9a15e9fca1cd984ea160c6e6a705abb. 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/FRZ668601350.
Cyrano de Bergerac (Original Motion Picture Soundtrack)
Messieurs Les Enfants (Bande Originale du Film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a205283cb5389be06b9f44ae5a5f3068096090432bee88e61e3416bf276b4ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRE709500030.
Lumumba (Original Motion Picture Soundtrack)
Les Vivants et les morts (Bande originale de la série télévisée)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c569078502d977eaf509b180d8ddde821ad0e51c28dd2a176aac8d43e55555. 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/GBAYC2301879.
Theme (From "Cyrano de Bergerac") [arr. Michal Worek]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d0e21672cab9b76d5112818485b9372f7f02573b0d718821f5f38dbfd3e1e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CH1602211118.
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