Jean Victor Arthur Guillou (18 April 1930 – 26 January 2019) was a French composer, organist, pianist, and pedagogue. Principal Organist at Saint Eustache in Paris, from 1963 to 2015, he was widely kn
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 0x1c20e06f536a2a8dad05fb7329e8d163eecb777a71e1d4217eb892fae0aceb93. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/463ce4c8-e7aa-4b48-8447-9151009bac88.json and https://artists.proofprofile.net/proofs/artist/463ce4c8-e7aa-4b48-8447-9151009bac88.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Biloulou-Safari (Improvisation pour le film Congo-Safari de Marcel Isy-Schwart)
Jean Guillou à Saint-Sernin (L'orgue, souvenir... Live)
Jean Guillou à la Matthias-Kirche de Berlin (Live)
Haendel: Les 16 Concertos pour Orgue (Transcription et cadences de Jean Guillou - Live)
L'orgue souvenir... Cathedral de León (Live)
Julius Reubke: Sonate pour Orgue - Sonate pour Piano (Live)
Guillou plays Guillou at Notre-Dame in Paris
Les premiers enregistrements - 1966-1973 Les modernes (Vol. 2)
Les premiers enregistrements - 1966-1973 Les classiques (Vol. 1)
J.S. Bach - Musicalisches Opfer, Orgelchoräle, Passacaglia
Toccata And Fugue In D Minor, BWV 538 "Dorian": 1. Prelude (Toccata)
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 0x86b67ddca6a938f121f13c92117af024241d0d0ccf798ca95d17b088e70a27e5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904740 — a six-check JSON result.
Toccata And Fugue In D Minor, BWV 538 "Dorian": 2. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b8d8ac47019744fec65af42d04393ab06e4aabe47308c2012fb194deddd21. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904750 — a six-check JSON result.
Fugue in B minor BWV 579 on a theme by Corelli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a5cca21287ac0b54f9232f7d7c68ed5a3a4a97cc0e3ba44ff6fab2927a324a. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904770 — a six-check JSON result.
Toccata (Prelude) and Fugue in F, BWV 540: 1. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a311f48c3d2f2c9740ab4262f24eb4c358d24eb73fc4dfcf3403f219c543d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904790 — a six-check JSON result.
Toccata (Prelude) and Fugue in F, BWV 540: 2. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ac292ae34bc49b9fa9e8e67ba9f60da5d92a2297ef669b7a19d85101c8a43. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904800 — a six-check JSON result.
Prelude and Fugue in E minor, BWV 548: 1. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9272e540a43b9753c017c0c394a6467c601d51db1d45b0290a0c52a612fa372e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039905010 — a six-check JSON result.
Toccata, Adagio and Fugue in C major, BWV 564: 1. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a26857f10c1c3f94e34a3c602e9955ef5230afc709ee5e198b9aa33a4a5242. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904820 — a six-check JSON result.
Toccata, Adagio and Fugue in C major, BWV 564: 2. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59fca0e4768cbf7b6d88a7c1dda4f040263ed647b303893da7e8521334ff592. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904830 — a six-check JSON result.
Toccata, Adagio and Fugue in C major, BWV 564: 3. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53399e0a13b8691216df0f613f97887d156acde2f89ebb71cad45464b018f86. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904840 — a six-check JSON result.
Toccata and Fugue in E, BWV 566: 2. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5b76779f5ec9ed1f8b0310a27420865e6fafbe8e160b1eac921a69550739e0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904870 — a six-check JSON result.
Toccata and Fugue in E, BWV 566: 4. Fugue II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f7117128519d64533b6d98533a74e4e6e8f9a8ec0d97c1dd1ebce65f1ea259. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904890 — a six-check JSON result.
Fugue in C minor on a theme by Legrenzi, BWV 574
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d022f1cc95181196f066b1dba24623218bc28b4815685a8f5d725e79587b707. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904900 — a six-check JSON result.
Toccata And Fugue In D Minor, BWV 565: 1. Toccata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab41da88873442e416d213f3b593de269f16759241c3284e37db7f88dcb671c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904920 — a six-check JSON result.
Toccata And Fugue In D Minor, BWV 565: 2. Fugue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a3bcbdd0a0691ec8d078aa04916661338ce26cc8cc61262278f129449067d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ039904930 — a six-check JSON result.
Saint-Saëns: Symphony No.3 / Widor: Symphony No.6 - Allegro
Symphony No. 3 in C Minor, Op. 78, R.176 - "Organ Symphony": 1a. Adagio - Allegro moderato -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439e87d6485c8547541eb277124e4937bdf9910f5eef828e8e6af47402bb254. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508400901 — a six-check JSON result.
Symphony No. 3 in C Minor, Op. 78, R.176 - "Organ Symphony": 1b. Poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1fd5de5010de87605a8de3481c03c4397ba8f1312d82f8382694163b24c2bb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508400902 — a six-check JSON result.
Symphony No. 3 in C Minor, Op. 78, R.176 - "Organ Symphony": 2b. Maestoso - Più allegro - Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a1baaf0bad9ca770637853eb679074d0dbd12c26bf44c18c242032fc17880. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA508400904 — a six-check JSON result.