Gabriel Yacoub (4 February 1952 – 22 January 2025) was a French musician and visual artist. He was a lead member of the French folk and folk rock band Malicorne from its formation in 1973, as a pionee
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 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 0x4734eddfca4c8cdcbb0ca29868c12b21b2a517110b809ba29e4fcb9beba10321. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94615b42-2da0-4bd3-b092-818271f10e65.json and https://artists.proofprofile.net/proofs/artist/94615b42-2da0-4bd3-b092-818271f10e65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Je vois venir... (Enregistrement public)
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 0x93e812be6085e9b2db3f747ec3a1c165d7367d3bf371475bb331d40f8ed262db. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FRP560410107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc9229064b8165ae8cffe942b67009ae9a82874f688fc6e03332c307028f1af. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRP560410120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b48eea9fcd011d718e89edb71f0db0fd96edee8956a49cbfcd8d03d68e04cba. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRP560800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80d2ef79e0373f481a8f96145c2ba6450d9d745fa3208bc0d46cf9826e7df6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR6V89400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1611166063fe9c53c3fabeb8a3b251fc325f718734d7546e629636c31b4dc3. 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/ES5590601308.
Fast Folk Musical Magazine (Vol. 6, No. 4) Fast Folk Revue-Live at the Bottom Line 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c36a36ba17eaec146d3f2eeaa1fea3d45cb25efaebe58b5db6e6507c427e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSF19260405.
Anthologie De La Chanson Française - L'histoire En Chansons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80d2ef79e0373f481a8f96145c2ba6450d9d745fa3208bc0d46cf9826e7df6. 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/FR6V89400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30394855f0587c2afb12ce3f7f7b0af878928772c11aa9bd3e7d4897a72c281c. 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/BEW630703312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42b6bb33f5c72afd09a3a59c6760da4e916bbfd2143d8a86256e530fcfe2437. 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/BEW630703313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6836ec94ece83ab5836c5706591f7caa0a19d078a7059299a7deb1e802f56cae. 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/BEW630703314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fc5dad015dfc0c46cfee6628d0dc58e45581b0fb6da6aeff56e33ed29953b8. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BEW630703315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48f9f0f17a76215218ac536fdd4960173c8912cb186efea56a0751cb75ae144. 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/BEW630703317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a77d27a93bc6b36b8ecb2846070661ed2436629868a2ec6225ad6d52e116d. 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/BEW630703319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c99ce8b6b2e2a9e771d33716adeb669280100d393b482cdc99537dcd4ccc1. 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/BEW630703320.