Bohuslav Jan Martinů (; December 8, 1890 – August 28, 1959) was a Czech composer of modern classical music. He wrote 6 symphonies, 15 operas, 14 ballet scores, and a large body of orchestral, chamber,
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 0xab9f8ce6fcb398ddd5d22504def32c4cd86e6d53566a347037a0c0769baec801. 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/f19431c5-98e5-4baa-af5d-1f9f9bb16de3.json and https://artists.proofprofile.net/proofs/artist/f19431c5-98e5-4baa-af5d-1f9f9bb16de3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Serenade for Strings in E Major, B.52: I. Moderato
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 0x6dbda397fa9a77bfc0b75f7e9f9a6fa64bde71a14fda60a0cf2e3e68303ac45c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202828.
Serenade for Strings in E Major, B.52: III. Scherzo. Vivace
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Serenade for Strings in E Major, B.52: V. Finale. Allegro Vivace
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Suite for String Orchestra, JW6 No. 2: III. Andante con Moto
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Suite for String Orchestra, JW6 No. 2: IV. Presto
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Suite for String Orchestra, JW6 No. 2: VI. Andante
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Serenade for Strings in E Major, B.52: II. Tempo di Valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2a7415807cd32bdaec5a7e878363e9c1cec6099dc30b02bec02ff1873e560e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202829.
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
Serenade for Strings in E Major, B.52: IV. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607aef8dacf4b4f771731e8e5bccfd2db158b68e82412ba311cf90a93218d65. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/NLY332202831.
Suite for String Orchestra, JW6 No. 2: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aa0a395ac42c8fafcc1f9a07fae2c6333dc3fcd37549d3e3190b391f3eac12. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLY332202833.
Suite for String Orchestra, JW6 No. 2: II. Adagio
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Suite for String Orchestra, JW6 No. 2: V. Adagio
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Meditace na staročeský 'Svatý Václave', Op. 35a
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Partita Suite No. 1 for String Orchestra, H.212: I. Poco Allegro
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Partita Suite No. 1 for String Orchestra, H.212: II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba727dff20c2f05cb324e51f487579c3c217c7c2767655368d90e549cc660b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202841.
Partita Suite No. 1 for String Orchestra, H.212: III. Andante Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2fcd8e9d376071ecb302f09988dfe203d434c7569a14d590f52313b36c63d0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202842.
Partita Suite No. 1 for String Orchestra, H.212: IV. Poco Allegretto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726df55254a82bcd1b5d210023460b7982818110887fa99e179f1b007643713. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332202844.
Martinů & Suk: Piano Quartets - Dvořák: Bagatelles, Op. 47
Martinů: Field Mass, Memorial to Lidice & Symphony No. 4
Bohuslav Martinu: Complete Cello Sonatas
The Parables, H. 367: III. Poco allegro - Moderato - Poco allegro
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Double Concerto for Two String Orchestras, Piano and Timpani, H. 271: I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ffa9eeb25477022f5fbfe0ceb15025c5d7e2f79b0bbdc6a6b646635222c632. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FROV65838901.
Smörgasbord: Encores and Short Pieces for Cello and Piano
Britten: Scottish Ballad - Martinu: Concerto For Two Pianos / Fantasie / Three Czech Dances
Britten: Scottish Ballad - Martinů: Concerto for 2 Pianos and Orchestra, Fantasie for 2 Pianos & 3 Czech Dances
Martinů, Krása & Kalabis: Harpsichord Concertos
Three Madrigals for Violin and Viola, H. 313 "Duo No. 1": I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee26eb33a4d9610ce4d151887f5d4d43dff15d4850714cacf0246f19580ab54. 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/CZA160800496.
Martinů: Les Jeux de Marie, Cycle of 4 Operas