Lucien Voulzy (, born 18 December 1948), better known as Laurent Voulzy (), is a French singer-songwriter, composer, and musician. Life and career Laurent Voulzy was born in Paris, France. Early in h
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 0x60b56bc5bf97f2e46b33d0d8fb5493f843fcf187cb44c48e0d485a176957d97e. 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/aecbef00-5767-4f35-8dba-6f385af0e082.json and https://artists.proofprofile.net/proofs/artist/aecbef00-5767-4f35-8dba-6f385af0e082.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 0xa72a67fb7740f290b9c2bb8ab1cb73614d16a6903b2696db367b613b629e345b. 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/FRZ057700010.
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 0x64103dff91152324397ec3c580abfaa25606540d6fa3f026744e7767b610a938. 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/FRIDO2011812.
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.
Vole (2 générations chantent pour la 3ème)
Vole (2 générations chantent pour la 3ème) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3acad63540988e206debc358526b7349f1f38b87dd5debe9b1bc910a6713c. 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/FR1A91501633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8102a3b9bb96e90f2e826b84235fa2e0531a58c442d2e6afd0b2bf08484574f2. 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/FRUM71800326.
Un jour quelqu'un vous embrasse (feat. Laurent Voulzy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4768a46075a530b703141ef9bf93aaa260776cae6de30e703325fa2146a0182. 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/FR8Y71300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b0e700617253556dbb7f5e960ea64eab45967d7dc6563a6abdcfc78c645e6. 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/FR9W12347964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcf25e03b393ea0800edbfcf7b91bbe3e5ce9a13fcae4f96e41781e3cabc35c. 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/FR9W12331125.
Breizh eo ma bro ! La bretagne est mon pays !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9bcaca871bb76007a5d1ef92c247058a33264d9f63acbf6cc46774521c5d7. 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/FRZ051700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a7624d8843d282d5648cec73aee2fbe4d0352c322f07a163587db6876c307. 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/FRUM70801922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fa9f6eba264deef3e2c376eab6283f4cfc76157a01bb45b98d45b538c28e6a. 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/FRZ111200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adbd5848faec990e2c3131282ad8c92aeeabfa755e4106a3487175364f84f2b. 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/FRT408600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d94ec09f866106a1c33e13163ee21c2f235fcc7e6cea1ab95b0314703b03ccc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12332942.
Chanson du coq et de l'âne - Version Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e99a594be1d42bdbc92235aa4c89c4bb3cd4b225b3d137a73107bcb83451ca. 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/FRZ081800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e7559ddbe8f3a81e61788aeddaa8e526bbe43c47ff6f49a723d36a5ec98da6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FRUM71612954.
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 0x0bf2b5db82e8214f6426b8b0a1f3a56d60030244ca7c9cad45523a174fbcb2f5. 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/FRZ057800521.