Gustave Joseph Viseur (17 May 1915 – 25 August 1974) was a Belgian/French accordionist. Early life Viseur was born in Lessines, Belgium, on 17 May 1915. His father was a bargeman, so the family moved
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 0x353e3953b666ff66879abf52cb8f2f38bd3e62d8b7964d969097224244c845b0. 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/f1a39fd2-e6e8-4c55-b6b2-69491f5d499d.json and https://artists.proofprofile.net/proofs/artist/f1a39fd2-e6e8-4c55-b6b2-69491f5d499d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les classiques du musette (Mono Version)
Le dénicheur / Mignonette (Mono Version)
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 0xd611a9ec2b036e23d9216d977b74a1190eb585b50f110a1baac146208917a865. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/FRZ111000804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a6ec0e4f370a3ed9245d137dc43cf3155d6143745b148f5b3ff856339e657. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRZ111000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed60fd900f61e3dba0c4c72c35896998b14fb320a5be179d80974836a2517ab3. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/FRZ111000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba54adeff125171547337f980c9edd469bb7bfc6145230a43c8a8a6ace75909d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRZ111000816.
La Belle Histoire De l'Accordéon, Vol. 4 (REMASTERED 2024)
La Belle Histoire De l'Accordéon, Vol. 20 (REMASTERISED 2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63261ae49132e85bac90585b11db12e0d9fe33dde9a8fe53451de4dff45ec1dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRZ026280170.
Swing Valse (Collection "Les archives de l'accordéon")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f68f93ac805eb8e0a5d00fd90b225164052a2a7a7eca4347aefcb4321b73a. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/FR6V80836847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf3364b1b1543ef5b96243a40ff7f061a7b5da0fda8ebf10f35f666c15130b8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR6V80836854.
Gus Viseur 1942-1952 (L'accordéon musette élevé au rang des beaux arts)
Le Jazz Manouche Par Jo Privat Et Gus Viseur (Remastered 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f76248c1462c71991c7fefdc6d41b2e0cb9d98c76a19616107e2963ea866169. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRZ811412128.
The Parisian Series: Gus Viseur (Restored Edition '25)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f167f0d69ec1354e31e80d49b2503a762605864375e823bca7efe25c60acd. 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/FRX211707006.
The French Dispatch (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68298e03cccbd339f304fac0c142dd7c8c606044b489b55feabf065e43dbfe9a. 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/FR5V64208010.