Jaroslav Tůma (born 1956, in Prague, Czech Republic) is a Czech organist. This organist, clavichord, harpsichordist and pianoforte player graduated from the Prague Conservatory and from the Faculty 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495471892b454d77ba4132980e2cd128541812bd3696861db12eae81b9941410. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ef71df-0a85-4e7f-8c72-bb65e4185dc3.json and https://artists.proofprofile.net/proofs/artist/a9ef71df-0a85-4e7f-8c72-bb65e4185dc3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dvořák: String Quartet No. 2, Bagatelles, Largo
Bagatelles, Op. 47, B. 79: V. Poco allegro
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c848c1c1a60f8b91e564b4082a652a96afe774886519ad9ac69cc7f385efff. 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/CZA169805087.
Jaroslav Tůma Moje Vlast (Organ Improvisations on Bedřich Smetana's My Country)
Wenceslaus Wodizka - Europäische Musik des 18. Jahrhunderts
Rejcha: Two Sonatas - Four Fugues - Oshima Tůma
Historic Organs of Bohemia, Rychnov 1843
Warum betrübst du dich, mein Herz, P. 483
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Bach: Inventions & Sinfonias, Duets (BWV 772-805)
Janáček, Novák: Complete Organ Works (Historic Organs of Bohemia)
Boccherini: Sonatas for Cello and Harpsichord
Bach: Sonatas for Violin and Harpsichord, Vol. 1
6 Organ Concertos, Op. 4, No. 5 in F Major, Op. 4: III. Alla siciliana
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Bach: Sonatas for Violin and Harpsichord, Vol. 2
Telemann: 12 Fantasias for Violin without Bass and 6 Sonatinas
Guitar Concerto in C Major, RV 425: II. Largo
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Concerto for Two Guitars, Strings and Continuo in G Major, RV 532: III. Allegro
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Chamber Concerto in D Major, RV 93: I. —
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Guitar Concerto in C Major, RV 425: I. Allegro
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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
Guitar Concerto in C Major, RV 425: III. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b2112e9cf24d4d413bc6e0e9cf76167054737fadd67ca0f6392e8d68090af5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA168703077.
Concerto for Two Guitars, Strings and Continuo in G Major, RV 532: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ace17a1651ec40b7a1a8724ba4a41450a75ab10fd928725c583ae06f935bd9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA168701078.
Concerto for Two Guitars, Strings and Continuo in G Major, RV 532: II. Andante
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Concerto for Viola d'amore and Lute in D Minor, RV 540: I. Allegro
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Concerto for Viola d'amore and Lute in D Minor, RV 540: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b4e7540f29d8f6d95528d13b4db8fc4956abd30954f168b3fec93c6e578d82. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CZA168702079.
Concerto for Viola d'amore and Lute in D Minor, RV 540: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf827f3438702d0fb59097b3b000311aaea9a60fc18b879b9e080a57dae83f09a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA168703079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c73fa17cd4476f896e79929cf41a812d0ae8a8d755d8c91ca33412542a6d70. 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/CAM460670222.
Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
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Piano Sonata No. 16 in C Major, K. 545 "Sonata facile": I. Allegro
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Piano Concerto No. 26 in D Major, K. 537 "Coronation": II. Larghetto
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The 99 Most Essential Mozart Masterpieces
Le Nozze di Figaro (The Marriage of Figaro), K. 492: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c73fa17cd4476f896e79929cf41a812d0ae8a8d755d8c91ca33412542a6d70. 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/CAM460670222.