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 0x6086b65784dfe902f823479da03eb3da0b5b3f6f4937a268048482c96877c2a4. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e69f6061-0e5c-468b-b0b4-10c4b968c8aa.json and https://artists.proofprofile.net/proofs/artist/e69f6061-0e5c-468b-b0b4-10c4b968c8aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alexandre Guilmant: Troisième Messe solennelle
J.S. Bach: The Complete Organ Works, Vol. 5: Concertos, Fantaisies, Orgues de Béthune et de Bourron-Marlotte
Mozart: Organ works, L'œuvre d'orgue, orgue Yves Fossaert de Bourron-Marlotte
J.S. Bach: The complete organ works, vol. 6, preludes and fugues
J.S. Bach: the complete organ works, Vol. 8: Chorals, Prélude, Fugues, Fantaisie, Trio.
Le carnaval des animaux à l'orgue de Vouvant (Vendée)
Inauguration de l'orgue Yves Fossaert de Vouvant
J.S. Bach: The complete organ works, Vol. 7: Toccatas et fugues, 8 petits préludes et fugues, Canzona, Pastorale (Orgue Grenzing de l'église de Saint-Cyprien en Périgord)
The Complete Organ Works, Vol. 4: Chorals de Leipzig, chorals de Weimar, chorals divers (Orgue historique Eilert Köhler de la Kreuzkirche à Suhl [Thuringe])
Evenou Shalom Alerem - Soprano et Orgue [Live]
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 0x6f02bf17e187061af9e9e9a16baeebe811aa2139cea58ea06dda335590924ac2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11706229.
Bach: The Complete Organ Works, Vol. 3: Clavier Übung et chorals divers
J.S. Bach: The Complete Organ Works, Vol. 2, Orgelbüchlein, 24 chorals Kirnberger, orgue de Saint-Cyprien en Périgord
J.S. Bach: The Complete Organ Works, Vol. 1, 5 Partitas, 34 Chorals D'arnstadt
Organ Favorites: Les Plus Belles Œuvres Pour Orgue
Mille ans de Noëls, orgue historique de Villeneuve-sur-Yonne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61744c71d406c590c0d383dd2ec627c86fe092446a65d56b28731c18457b0a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542374098.
Liszt: Evocation à la chapelle Sixtine, Oeuvres sacrées pour orgue (Sacred organ works)
Boëly: Pange Lingua: L'année liturgique - Vol.2
Boëly : Pange Lingua : Pièces pour l'office divin - Vol. 4
Boëly : Pange Lingua : Pièces en Style moderne et maîtres anciens - Vol. 7
Boëly : Pange Lingua : Morceaux et Fantaisies pour l'orgue expressif. Florilège - Vol. 8
Boëly : Pange Lingua : Les Douze Pièces avec pédale obligée opus 18 Grands Solennels - Vol.6
Boëly : Pange Lingua : Le temps de Noël - Vol.1
Boëly : Pange Lingua : L'année liturgique de la Sainte-Trinité au Jour des Morts - Vol. 3
Buxtehude: Pénitence, Réforme / Penitence, the Reformation
Dietrich Buxtehude : Phantasticus - Intégrale des œuvres pour orgue / The complete organ works
Buxtehude: Louange, Sainte Marie / Praise, Holy Mary
Buxtehude: Le temps pascal, Esprit Saint / Easter Time, Holy Spirit
Buxtehude: Le temps de la Passion / Passion Week
Buxtehude: Le temps de l'Avent et de Noël - Advent & Christmas Time
Buxtehude: Le temps de Noël, Vie chrétienne / Christmas Time, Christian Life
Estives musicales sur l'orgue de Louvie-Juzon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4fb2122f2d818db2ba31f9d1f9c0ba5ba8e17d919002b263a46b4e212e74b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH6542476232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9411c32a8cea275cdf01fd0f5649796c1688da28328cadab518df2f59a76ae25. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6542476234.
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
J.S. Bach: The complete Organ Works, Vol. 9: Variations canoniques, Chorals Schübler, Partitas, Fugue-gigue, Aria, Fugue Magnificat. Marie-Ange Leurent et Eric Lebrun, orgue de Saint-Jean de