Paul-Alain Auguste Leclerc (born 4 October 1947), better known by his stage name Julien Clerc (), is a French singer-songwriter. He rose to fame with his song "La cavalerie" (1968), that captured the
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 0x94e1f4f926e206435c307fd168bd711e4ccd43146e5096d1b3dc82813f88846c. 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/2e150a1a-6a08-4ced-8c2e-3d121b338541.json and https://artists.proofprofile.net/proofs/artist/2e150a1a-6a08-4ced-8c2e-3d121b338541.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe86e86a1097590cffde20248dd62c24f2b6483ca445738353e5d25af4808cb. 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/FRZ609400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbd0d05ba747e6264d6646e496d758caaa23697f8eb0abc7eeba1117c97af19. 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/FRR499700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf3e3fb8d4fbd5e6974726f1d7158ff52b36bcc2f41d2ce64a203f25ef12072. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR499000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a33ed824d5d693006d75e974445d6f414c369f6ea1338321de57503714dd868. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ608200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b56f2b782f20f49884714784690ca8492aeab713bcc05bbd6c30af7d4e1f3f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ607800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239cccc9e92fd864aac4ac0302a354db0ca5006118e0e33d1d8ca7c74063e0ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ117500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be142861251981d5c0fc024e0309178d829070d34b205199944d3d1802bfec1. 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/FRZ117006392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91f93fcea58ccfe255cfc90454f8dfb76f69d3dbdda2624a7b8eafcceded433. 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/FRR497700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7088c359bc870c02bdd02779d98e39d11e21bb7c4c93199692276ab4290f5345. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ608400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c578a08953ed5d72b0ad9af34b3ea3a156fdc2aa30ea4fe4fdf421a4f03b06. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRR498700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cc520b9eb4ce573d029cffb5c43eab60ab2b6daaf9b5f3591bdea243b1b0f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRR499700010.
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 0xb37311082a807af01a7b74b667015ddc75045ca67befefb400234700b282643b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRZ609200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2093ec721463e0ca93912b0195622aec41a38c8f21dbd2b9661085e978c7a5a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRZ117206388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3100044040b1ac9d31516959ff8d365cfdc8026af4d3cef4c0c4d1a55adf6b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRZ609200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1149b8cde968a4ff278556ea62c797d0d7fa78b218221809abea40e59940a9e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRUM71800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623b1ca1ae933daae0c8a93a81e2d2884f249adc0b57ba99e53902f5bf1a93a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRUM71701519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb19da725de22e36e16bf0f4344d9ddac1d5845f367425b6528335a28453d23. 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/FRUM71701524.
Pierre et le loup, Op. 67: theme de Pierre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fd5a9b14d8d1e6ffb5cba26118b3594d7778402e5e46fd7278f1bf6b4a25bf. 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/GBAYC0802430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa20a79bfae73189461082b9de4479daa44dd1bbd133375663f893d3b1e99e. 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/FRZ082100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c721af43a267561ab4fb78c9e64bd8e64562c735a91b614a337539063f37e83. 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/GBAYC1801338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaa20a79bfae73189461082b9de4479daa44dd1bbd133375663f893d3b1e99e. 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/FRZ082100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c1ab38ae717e08ea3c83241a78d54fc47850a7d08f17fcc7d366988fd5e7b. 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/FRZ800600810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7fd927c9365a27ea3fb4ae58a937a2c323bd2588aa95a4737d040e05feb96. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRZ042201508.