Witold Roman Lutosławski (; 25 January 1913 – 7 February 1994) was a Polish composer and conductor. Among the major composers of 20th-century classical music, he is "generally regarded as the most sig
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 0xb1a37806eab8d3bf0390e3459c6e9633ddc403802f24fcd3eaf46ba8649a8c7b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3ce65f8-b939-434a-b1a7-527be81b5c6a.json and https://artists.proofprofile.net/proofs/artist/e3ce65f8-b939-434a-b1a7-527be81b5c6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lutosławski: Symphony No. 1, Partita, Chain 2 & Preludia Taneczne
Lutosławski: Concerto for Orchestra, Partita (Version for Violin & Orchestra) & Novelette
Concerto for Orchestra: I. Intrada. Allegro maestoso
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 0xcaa8e092c5570d70af3831430d9e90f727819d8c04de0f878e782e0308ab5f4d. 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/FINDE2300121.
Concerto for Orchestra: II. Capriccio notturno ed arioso. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cecc44eae3fee7fd73553afb75973905090826ba38bc9e1d00c8413988e1eb1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FINDE2300122.
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
Concerto for Orchestra: III. Passacaglia, toccata e corale. Andante con moto - Allegro giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0246ffbea14f352cd97402d70744b6a80f3fd5ff27dce51ce98bf4fe7d8f4f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FINDE2300123.
Symphony No. 3: Vivo - Lento - Vivo - Lento - Vivo - Stesso movimento - Lento
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Symphony No. 3: A tempo - Poco meno mosso - Presto - Stesso movimento - Poco lento - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8225de2eb5a36b0760a343fefcfed1f9e2cc9749556984efd5988e2e80f281. 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/FINDE1900171.
Symphony No. 3: Vivo - Stesso movimento - Lento
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Symphony No. 3: Vivo - Stesso movimento - Adagio - Piu mosso - Lento
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Symphony No. 3: Vivo - Poco meno mosso - Meno mosso
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090935fab854072da07512cf933bfed44d7e10fbddffaea3e38c552c8fe45ad5. 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/FINDE1900169.
Symphony No. 3: Meno mosso - Tempo I - Meno mosso - Tempo I - Meno mosso - Ancora meno mosso - Piu largo - Tempo I - Lento - Vivo - Lento - Vivo
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Lutosławski: Symphonies Nos. 1 and 4 & Jeux vénitiens
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b336d703efb9d36abda5fbac476622ed1466a054e14a8d98b059e6f84443ec9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLA161394904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ace81dcbdd9e9cf224ff99fa631edd61ba13c04a53aa8917f4cbb1d9bee0c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLA161394902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3478df78fe639a95f357651657809fc14b89d2c2b83148301a78713d732ff642. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PLA161394903.
Concerto for Orchestra: I. Intrada (Allegro maestoso)
North German Radio Philharmonic Orchestra
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Concerto for Orchestra: III. Passacaglia, toccata e corale (Allegro con moto - Allegro giusto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895ffffb64f80d1295cf72b3614a5c8510f0245e0622067d7b5f7817c499b89. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR50X1523203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd023dbee8770f71c9468d81d0e7920cfe812caa8c4289a2e3612ff7378bc600. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1523204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa622717e7d88374aee93dd57783f97afc75f47134e4eb5539ba2e6eb5f3854f5. 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/FR50X1523205.
Little Suite: IV. Taniec (Allegro molto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d3f4fbe71f170e85cef8cb16d4f1ad87420488047e5aed5affe24e94870d86. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR50X1523207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa833cee77477bfe2898f7f80d2e2aa573ad782a8774a6d70ea98de0c1786219c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1523208.
Szymanowski: Symphony No. 2 - Lutosławski: Livre & Musique funèbre
Lutoslawski: Piano Concerto; Symphony No.2
Concerto for Piano and Orchestra: IV. Quarter Note = 84 - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68badddb32fea0af61491587545558ec90f556d0ec77d9304ceef340ad80bd7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961305014.
Concerto for Piano and Orchestra: I. Dotted Quarter Note = 110 - Quarter Note = 70
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Concerto for Piano and Orchestra: II. Presto - Poco meno mosso - Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1676db56916c1aaf8ff0c48ed5561d11f0d2c7ced358dce3229003636e5cbb94. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DEN961305012.
Concerto for Piano and Orchestra: III. Eighth Note ca. 85 - Largo
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Lutosławski: Concerto for Orchestra & Symphony No. 1
Concerto for Orchestra: II. Capriccio notturno e arioso
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5fe7e6fc9e03eba481b42841991cf2c538c530732c7f11a5c2f20e7fd6639. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PLB351319601.
Concerto for Orchestra: III. Passacaglia, toccata e corale
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb406f332fbbe7bfd95a7435bf0ec0fe9b14fe601f1497e07b16be87ecb700e52. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/PLB351319604.
Lutoslawski Tuwim. Piosenki nie tylko dla dzieci.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56b4de7119b4d7e091b840f7a88262cd3ddf8a9a2ca8a6e1b33f9d74442ba13. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLB381300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda0f555d5c614587a2f2ab6ab1898bf3ffa4d4c8cb0fd31d03b2a978f1c5985. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/PLB381300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fd468dfcf6ffce44d5c398d45dd39484fb360417ccb92ab04ac2aab3eeb78b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLB381300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb7ee70bb763f9838c1bbac02ed22ed45d342d8f92dcae8a8f0a4e62bf425ef. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLB381300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c3ff6b7643956bb36cf69a43583b7c74c2968a093cebb9d919137a626c4786. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLB381300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9b9e9a3d025e022db4bd45d0420d779f14b1629d4abd84c0d2aa67fdbfcdd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PLB381300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef33df408e54e7bdaee24348f698c1fb41962effbd7c2a92e22f24664f72155c. 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/PLB381300251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02be1e6dd1d35f8882ac38d04d812466799470a6855af073b7e59e0f4d73344a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLB381300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5add022bb1979412f3ac22853b504b2d7da8162b1f3f807ccc8bff66c223e3b2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/PLB381300248.
Lutoslawski: Symphonies Nos. 3 & 4 - Partita for Violin and Orchestra
Lutoslawski: Concerto for Orchestra - Cello Concerto
Concerto for Orchestra: II. Capriccio notturno e arioso - Vivace
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Concerto for Orchestra: I. Intrada - Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48be2336eda051e9bb45ed630c324244e620101fffc64fd36ed988537a5dec75. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/PLA160549901.
Concerto for Orchestra: III. Passacaglia, toccata e corale - Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f36a912ec8dae116dfda0ea98b240bc57f6879d2b9e93ea7bfa5d5f3c938e7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLA160549903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96474b6e001d9e823ea0dd4aa5abc40fc0918fb51c8517cc93d28d51b678b7d2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA160549904.
Penderecki & Lutosławski: String Quartets
Witold Lutoslawski: Complete Piano Works
Lutosławski: Mała Suita, Cello Concerto, Grave & Symphony No. 2
Lutosławski: Symphonic Variations, Piano Concerto, Variations on a Theme of Paganini & Symphony No. 4
Lutoslawski: Works for Voice and Orchestra
Witold Lutoslawski : Intégrale des oeuvres pour Orchestre à cordes
Lutosławski: Symphony No. 3, Chain 3 & Concerto for Orchestra
Lutoslawski: Piano Concerto; Partita; Chain 2