Johann Caspar Ferdinand Fischer (some authorities use the spelling Johann Kaspar Ferdinand Fischer) (1656 27 August 1746) was a German Baroque composer. Johann Nikolaus Forkel ranked Fischer as one 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 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 0x400ffd47122cd1010857f73f04d272c76d6457e6ab78753fd76f4ee127f44393. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5efdfd80-e622-421b-8ea3-f825da3dc591.json and https://artists.proofprofile.net/proofs/artist/5efdfd80-e622-421b-8ea3-f825da3dc591.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Johann Caspar Ferdinand Fischer: Musica Sacra
Overture (Suite) in A Minor, Op. 1, No. 2: I. Ouverture
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 0x5c70716bfd9c6dca1a69af4c2852e5671bd9279106b3eca72cd0560de032798b. 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/DEB200715001 — a six-check JSON result.
Overture (Suite) in A Minor, Op. 1, No. 2: II. Plainte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a200fe1e14daa13463bc519a48fa2f5666ae4f836fd9dc409da375459ce12a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715002 — a six-check JSON result.
Overture (Suite) in A Minor, Op. 1, No. 2: III. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b490675daea002fc13e476c02f3a8870623127d377a65c31019110f4679646a. 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/DEB200715003 — a six-check JSON result.
Overture (Suite) in A Minor, Op. 1, No. 2: IV. Bouree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313ee430c93c4e933101d7219529f5ad5e749ce648f21dbf8548730a23f0a443. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715004 — a six-check JSON result.
Overture (Suite) in A Minor, Op. 1, No. 2: V. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6daffacb241a00719555a91028073e427298c26aeb844cc49e17cc4922f3268. 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/DEB200715005 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d9370dbf1f57d08496748e21d99b28ac6f3af601bc7c192c8b04bcc19da354. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715006 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: II. Marche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d98b51791d8bca1b51d502fcd226555cb4338add4e58c27427662b190cf9a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEB200715007 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: III. Air des Combattans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d38d6939617f7df6efa3518ed3c23547f71dec0501e232425e72eb5c86a06. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715008 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: IV. Rigaudon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904909803bf30ddea212fe340d0010c6c2fd29c3a60eede7fbab507351e76cb2. 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/DEB200715009 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: V. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f36bedbf9aa4f9f9abd70508e40b890876031467acb5b71d8f6c208f19f2ff. 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/DEB200715010 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 1: VI. Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f3372d2d89bd804a74ec84f7da9a0bda596d1053349120763158ae0770a00c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB200715011 — a six-check JSON result.
Overture (Suite) in G Minor, Op. 1, No. 7: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cdf66c3f61d4c9ec9458a6533f291e225dfc0b6e23c26e391030e898a67804. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEB200715012 — a six-check JSON result.
Overture (Suite) in G Minor, Op. 1, No. 7: II. Passacaille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a375f73eadf9f8aaed9bb8cda6e2f72fd46211919a12178d1056c8419ead5a. 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/DEB200715013 — a six-check JSON result.
Overture (Suite) in G Minor, Op. 1, No. 7: III. Bouree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab8d9b534e1e55636769f9add7003616214ea223e5516bd0c4cf72398b3fc08. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715014 — a six-check JSON result.
Overture (Suite) in G Minor, Op. 1, No. 7: IV. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267a89df868189609b8450561d9c9bdeb195759e869893b6aa082a17053abd6. 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/DEB200715015 — a six-check JSON result.
Overture (Suite) in B-Flat Major, Op. 1, No. 3: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92c892f5015d15051dafd14676076eb1ad583ea63cc6367812673adaaf5917. 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/DEB200715016 — a six-check JSON result.
Overture (Suite) in B-Flat Major, Op. 1, No. 3: II. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf984974743a670b52b2d9d259e60aa96568f1115310672c81ae0a1d67fc7aec5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715017 — a six-check JSON result.
Overture (Suite) in B-Flat Major, Op. 1, No. 3: III. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4b94a6621ee00a6e83ff752ed60baddf0ff591509d4e904ec948e16a7a34ca. 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/DEB200715018 — a six-check JSON result.
Overture (Suite) in B-Flat Major, Op. 1, No. 3: IV. Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25fd8eadb76c09f0f1f6e4b05ef591d643162933f0d0c9e377158268b2ddca8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715019 — a six-check JSON result.
Overture (Suite) in D Minor, Op. 1, No. 4: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b73e034b05f6a53304291153d8751e830e6fa09b81be6175f0801f25f216e20. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB200715020 — a six-check JSON result.
Overture (Suite) in D Minor, Op. 1, No. 4: II. Entree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9dfc47f9022136f609b28de0cc3b724ef03f7514cc662a327e30f436357b31. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB200715021 — a six-check JSON result.
Overture (Suite) in D Minor, Op. 1, No. 4: III. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1904262765756c2b0cb43f3bd37b220ef5a72dd99a29980ae1b535e1855247. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB200715022 — a six-check JSON result.
Overture (Suite) in D Minor, Op. 1, No. 4: IV. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37a0c5781651d40fc12d31d847f65327052a6f643b4e113ed76f41e885edd60. 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/DEB200715023 — a six-check JSON result.
Overture (Suite) in D Minor, Op. 1, No. 4: VI. Passacaille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f23c67680469f3e55327f785834f63599ae5f48742de7ffed6834fd6c58a5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB200715025 — a six-check JSON result.
Overture (Suite) in F Major, Op. 1, No. 6: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42f78a1df4a5ef12e6df734f2ff039a7cc22ed9632d3e3a77f971a29b01822. 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/DEB200715026 — a six-check JSON result.
Overture (Suite) in F Major, Op. 1, No. 6: II. Brandlay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815c16f9e3c08cf5ac237262e32a5aea7c5cc63c089938c9d11cf51a8fde023. 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/DEB200715027 — a six-check JSON result.
Overture (Suite) in F Major, Op. 1, No. 6: IV. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ce2b72f6792f795c9691c768e77c88b9c15e8dd98f1d6982d608fded56e8c9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEB200715029 — a six-check JSON result.
Overture (Suite) in F Major, Op. 1, No. 6: V. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab161969275b47ed0435bc210ae15a52bbd9837daae4557ae8ee5ff231796ab9. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEB200715030 — a six-check JSON result.
Overture (Suite) in F Major, Op. 1, No. 6: VIII. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880277893be9866b8d14f2bee4b507efff562a0d393a39b8d91a0273fb567fe. 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/DEB200715033 — a six-check JSON result.
Overture (Suite) in C Major, Op. 1, No. 8: IV. Gavotte en Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6049a94aa45b14ea60f617d1ebd1de59fc14eb682d39a6150f9874aa04d9b6. 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/DEB200715037 — a six-check JSON result.
Fischer, J.C.F.: Jubilate Deo / Missa Sancti Dominici / Vesperae, Seu Psalmi Vespertini / Lytaniae Lauretanae
Fischer: Missa St. Michaelis Archangeli, Missa in Contrapuncto & Suite No. 1
Johann Caspar Ferdinand Fischer: Musicaliches Parnassus
Suite in G Minor 'Terpsichore' from Musicalischer Parnassus (clavichord)
Euterpe from the Musicalischer Parnassus (harpsichord)
Polymnia from the Musicalischer Parnassus (clavichord)
Clio from the Musicalischer Parnassus (clavichord)
Erato from the Musicalischer Parnassus (clavichord)
Urania from Musicalischer Parnassus (clavichord)
Johann Caspar Ferdinand Fischer: Les pièces de clavessin, Op. 2. Suites Nos. 1 - 3
Fischer: Suite in D Minor, Op. 1, No. 4 ('Le journal du Printemps'): VI. Passacaille [Live]
Suite in D Minor, Op. 1, No. 4 "Le journal du Printemps": VI. Passacaille - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3033dd80d35b036db6cbfc27ed83b10989feb3ca9608990b2760cc591b6643de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FROV62540506 — a six-check JSON result.
Ariadne Musica: No. 8, Prelude & Fugue in E Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f67522267b80928c8d161d47336cf1596b130bfc30fbdcb0835ac67aba4bd. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR50X2201201 — a six-check JSON result.