Christophe Frédéric Durier (; born 3 August 1983), better known by his stage name Christophe Willem (), is a French singer and the winner of the fourth edition of Nouvelle Star (French version of Pop
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 0x13a79bbe3d325ada6da3f48a1efd8c6e536393d11ac85c413a024f834a0de027. 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/5188444f-2bf1-4b60-90ce-f70445bab0c6.json and https://artists.proofprofile.net/proofs/artist/5188444f-2bf1-4b60-90ce-f70445bab0c6.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 0x7a8d0267dc2f024cfd20a061a254cc74af9762cc514d5a661bb3da6034648e95. 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/FRZ050700178.
Nous n'irons plus au bois - Les plus belles comptines d'Okoo
Les plus belles comptines d'Okoo (Edition Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377a176a2ff521c35083d5ea97a0af88ab301c86bf822f069f4512ea099def96. 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/FR9W11926374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbe51c81ac786179bca0ddf27d55d506613dd585fc38dadce908b8d42450563. 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/FRUM71303015.
Frère Jacques - Les plus belles comptines d'Okoo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b5f20a8fbd160b89d4a471ebd7ad11ba02c31d5d6cc6bbba61bfef33c6e173. 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/FR9W12022212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7b8877da337d3fa2e7ab5bad34651c95dceac64171be319fcd8cba8993c976. 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/FRUM71303009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dfd0e036b8e852df698c8ddc7b5004d4a588722f8f68f7edbed0afd7b15057. 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/FRZ051500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec1bac3b4bc8060732e545bfd2b2fa3a446af0d8c0a3c0750af1f707b60a87c. 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/FRZ030402260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd15b195aba00a28d3c983ea8a8952aec937db720fb0497e22869480d91cbd. 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/FRZ030402280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c3024b4daa0e6651d5bbab24463c3a5c401f9b1b3ec220caa1a5fdb43b1aaa. 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/FR91X1901700.