Bertrand Lucien Bruno Cantat (, ; born 5 March 1964) is a French singer, and songwriter. Known for being the former frontman of the rock band Noir Désir, in 2003, he was proven guilty and convicted o
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 0xf05f85651c6a9efa80b75f381538b879b24c1f0973d9be738f60f12fc1cb0cf9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5949a1f7-dc94-40dc-8d6c-0978e0e3c7f4.json and https://artists.proofprofile.net/proofs/artist/5949a1f7-dc94-40dc-8d6c-0978e0e3c7f4.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 0x7d15e6988a20d169ccfad6d49e39d3fc8bf059a7db1c025c47b3c0f685b43e5e. 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/FRUM71701870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9333443dad4a3195fdd8bad9807360cdbf152cb9ec495e0229feb7e82c7d641e. 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/FRUM71701871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce0a93ed4928f3e477a2c4276562d475e7f4bf541417e2cb24f10eb76fe0086. 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/FRUM71701872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa3a0cc1879abee09d1c8e5c118efac371a2d2d6fd66f2d80513cdf887e576a. 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/FRUM71701873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b36237c5de29e386eaf21faa7ec0c2817e972b96eaea909c9dd6ea03ecfcac4. 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/FRUM71701656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96854a3345550b8661a3cef8d4cab2c367f6ed0df702461667d88a7d9649ff6. 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/FRUM71701874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46edbd31858ecf18ed2e80d7178f4d11be34a2a90de4cafdaddae6884f98d42. 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/FRUM71701875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cb8dff950db3c534ce4ec49a7419cae399cbcf27b1042228322fe30dc83a5f. 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/FRUM71701876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d13534c497d9a56aed3aa3dfd19b4d3cae53965102b5c0cf008c0e44ec12150. 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/FRUM71701877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b2735472bd85c18ecb0d98cc25a073627492dbc97c573a6b118797a20db7f4. 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/FRUM71701878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68b46826a20c849b8d5affa6a3d8051c8865c644062b711f614f6746a169ff5. 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/FRUM71701879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc719704b4b1747fb09a04bc1543cc48f4cccbb1a3a19d22ee1c6ba51cfa81eb3. 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/DEE351411618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cf0c8a4fcb1702f23d82a76d97e5e143b1bb8157ee0c8f9c2a1b3a3241a1e8. 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/FRUM71100581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3f56d19f9a2fd0bddf3a64c4230a7eed39d4ad63c4669afb5537b4db6eeed1. 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/FRX851200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41ec5671891dc861a05c91847c04be87384b2841a7c55b796c4e7762b19af89. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEE351211131.
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 0x0c2ec2727ebfe5e59b15541b80f60c885f5f2742641cc4a3b40592ffb15e3443. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEE351411615.