Thierry "Hazard" Gesteau (, ; born 7 June 1962) is a French singer-songwriter. Biography Gesteau was born in Compiègne, and grew up in Sèvres. During the 1980s, he became the singer of the band GPS,
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 0xac6b5f6601ab91f5f2e6aa3032c57b4965309fb9ad31bc2dfa0cbd19a2124f51. 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/ad3423d4-d2c2-4e62-94cd-1dd4da5a70a9.json and https://artists.proofprofile.net/proofs/artist/ad3423d4-d2c2-4e62-94cd-1dd4da5a70a9.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 0x860214bb9b96e66aab82fb97713b4a6f522bc552d4664c25a42a0d4efc291377. 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/FRZ089000450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba3aa679bda1d29232505aa19e388fdad0bf17b2f1c22938cde922ba9a4d2ff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRZ089000790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75883a630b024de70d76549e29a5d3ca102cc87859e1e5541b42022a4f4c0299. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ089000820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5ce00715f55080133d5907cef68d9e5bfbfcd22bcb56a1c7ded33407dd80b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRZ089000670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75591b0e34a8b220d33b3ff1fa86f73e186e57e25e1025af5a775488ab0a51bd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:00:24Z), 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/FRZ088900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93d9f8d0434b1c6897381cfe7c092669bb2d903f78ace747978a2407d7082e4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRZ089000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860214bb9b96e66aab82fb97713b4a6f522bc552d4664c25a42a0d4efc291377. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRZ089000450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f137570e140b221b0aa4ac61c6636e20c6f7b56453ce7c2e2a45eff7dc942b5. 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/FRZ088800140.