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 0x0700c800a7ed60df00ebd3364624a9f5755adb666c791f9862ddac70121978fe. 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/91157f32-7204-4a9d-b576-f41ad2de7321.json and https://artists.proofprofile.net/proofs/artist/91157f32-7204-4a9d-b576-f41ad2de7321.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sviatolsav Richter plays Russian Composers
Arapov: Violin Concerto & Concerto for Violin, Piano and Percussion
Tchaikovsky, Berlioz & Prokofiev: Romeo & Juliet
Klassik zur Hochzeit - Classical Wedding
The Symphony Lounge, Vol. 11: Khachaturian — Highlights from Gayaneh Suites, Spartacus & Masquarade
KONDRASHIN conducts MAHLER (Remastered 2025)
Symphony No. 6 in A minor I. Allegro energico, ma non troppo
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 0x65c7c23db71fe6c4d93067049c696bcd038be5d07843b81573a5da5ca4d2e33e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U2500319 — a six-check JSON result.
Symphony No. 6 in A minor II. Scherzo. Wuchtig (Pesante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f298450f29883a20473c9c95c99f8c134e1928da766405d0de4d08230b780c4. 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/USB8U2500320 — a six-check JSON result.
Symphony No. 6 in A minor III. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6374f7c62c79e83e97be5962d8ffcde7ca4b1e81433eb44c26fd9e4134a09222. 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/USB8U2500321 — a six-check JSON result.
Symphony No. 6 in A minor IV. Finale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422db1b65a17a5220541e93fbd22c2b361180ed6c9cc1c059e19b2c4b072670. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USB8U2500322 — a six-check JSON result.
Soviet Legends, Vol. V (Remastered 2024)
Symphony No. 5 in D minor, Op. 47 I.Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1e8539a9486e276a68d6f6771e1ac18c2445cad89605b6b64f4c49a8d37c3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ITCC56001720 — a six-check JSON result.
Symphony No. 5 in D minor, Op. 47 II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd7cca44d2f87966a848d4669baf01fda955edaac43580115dbd478ea349e95. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC56001721 — a six-check JSON result.
Symphony No. 5 in D minor, Op. 47 III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076dca6bff1a1fa43abd52088081ad8ae8d65f185993007480cace3f2389fe3f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ITCC56001722 — a six-check JSON result.
Symphony No. 5 in D minor, Op. 47 IV. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f09989acd5c1899b9e5e109491f1e328c824ac552383180b5971065a918de8b. 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/ITCC56001723 — a six-check JSON result.
Soviet Legends, Vol. IV (Remastered 2024)
Symphony No. 6 in A minor, Tragic I. Allegro energico, ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc80cd5b377732d0a630a895ca2d00f6e2cf8da49dc15bc2d1c56a0ff072f18. 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/ITCC56001716 — a six-check JSON result.
Music that warms the heart vol. 1 (Remastered 2017)
Piano Sonata, Op. 1: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c6e95739139e59fcc6ffbca0f5e68c6fd49e8713b14a8029807703c6d6d60b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC51103784 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cc9dfa5ef08914f49be056f0e8dfc87b669774ec575606174b315b05f9e248. 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/ITCC51103785 — a six-check JSON result.
Keyboard Sonata No. 3, Op. 92 No. 4: I. Allegretto piacevole, animato e flessibile - IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dec253afe431baae1debb6af30f26f0dfed878bb73497c1bdb9e7ab0a290fc. 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/ITCC51103786 — a six-check JSON result.
Die Kunst der Fuge, BWV 1080: Contrapunctus I - IV - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4479c66339a4c36ba612b4848fdabdb85a39a0efb7408d7a183f7738052f89e. 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/ITCC51103787 — a six-check JSON result.
Goldberg Variations, BWV 988: Vars. 3 - 18 - 9 - 24 - 10 - 30
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be14aaf3fbf93d5f022325393759627ff48739b5bc48627f7424cc0e6f95d58. 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/ITCC51103788 — a six-check JSON result.
Piano Concerto No. 1 in D Minor, BWV 1052: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe97530007c54c7b64701caf5b62f3f72777865b1884495ce5cdc0414611f231. 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/ITCC51103789 — a six-check JSON result.
Piano Concerto No. 1 in D Minor, BWV 1052: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b243e05ad076e8a65ecb09bc502eff2dcc143bb3cbf387963bc497915ea78. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITCC51103790 — a six-check JSON result.
Piano Concerto No. 1 in D Minor, BWV 1052: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d51c46ff1934f26afdd8dcac2c3f38937fe40feac74124d03c157a4adad307. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ITCC51103791 — a six-check JSON result.
Piano Concerto No. 2 in B-Flat Major, Op. 19: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445910b64afb1144f811233bc64e39f2d0b205d37962edb375ff87dc72c6535c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITCC51103792 — a six-check JSON result.
Piano Concerto No. 2 in B-Flat Major, Op. 19: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde4edb4beaa3fc949be35d041663e03659f7e525fc559964a9e5ddae29dc1c4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITCC51103793 — a six-check JSON result.
Piano Concerto No. 2 in B-Flat Major, Op. 19: III. Rondo. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55426ffc6a06ed9ba5da3304cb9fe39bda5bf10e67d8a247f1f365136edc157f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITCC51103794 — a six-check JSON result.
Rachmaninov: Isle of the Dead, Symphony No. 2
Tchaikovsky & Rimsky-Korsakov: Orchestral Works
Tchaikovsky: Symphonies Nos. 5 & 6 "Pathétique" (Live at Leningrad)
Tchaikovsky: Symphony No. 5 in E Minor, Op. 64: I. Andante - Allegro con anima
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Tchaikovsky: Symphony No. 5 in E Minor, Op. 64: II. Andante cantabile, con alcuna licenza
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Tchaikovsky: Symphony No. 5 in E Minor, Op. 64: IV. Finale. Andante maestoso - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7926fef86828159e4d3a1a53a2890454a6b654508c4795a1c357b530d3ded. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRZ208311604 — a six-check JSON result.
Beethoven: Symphonies Nos. 1, 3 "Eroica", 5, 6 "Pastoral" & 7 (Live at Leningrad)
The Magic of Mravinsky, Debussy & Scriabin
Symphony No. 5 in E Minor, Op. 64: IV. Finale. Andante maestoso - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e05c82e65ffd7280eed7f95809d5a4da34b8b9485643af7e8c3387aecbdc4. 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/USX761960308 — a six-check JSON result.
Tishchenko: Symphony No. 4, Op. 61 (Live)
Mravinsky Vol. 2: Tchaikovsky, Shostakovich, Berlioz & Weber
Mravinsky, Vol. 1: The Brahms Symphonies
Evgeny Mravinsky Edition, Vol. 2: Tchaikovsky, Mozart, Berlioz, Stravinsky & R. Strauss
Alexander Glazunov: Symphonies Nos. 4 & 5, The Seasons (excerpts)
Ludwig van Beethoven: Symphony No. 4 - Dmitri Shostakovich: Symphony No. 10
Jean Sibelius: Symphonies Nos. 3 & 7, The Swan of Tuonela - Claude Debussy: Nocturnes Nos. 1 & 2
Dmitri Shostakovich: Symphonies No. 5 & No. 12 "The Year 1917"
Symphony No. 5 in D Minor, Op. 47: I. Moderato
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Symphony No. 5 in D Minor, Op. 47: II. Allegretto
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Symphony No. 5 in D Minor, Op. 47: III. Largo
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Symphony No. 5 in D Minor, Op. 47: IV. Allegro non troppo
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Symphony No. 12 in D Minor, Op. 112 "The Year 1917": I. Revolutionnary Petrograd
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Igor Stravinky: Apollon musagète, Orpheus, Ode, Fireworks, Song of the Volga Boatmen
Igor Stravinsky: Petrouchka, The Fairy's Kiss