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 0xf923603fab66cf8a6bc43a31bb1781727f9689ff4c6d933463c99a542b9adc8b. 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/8a68c140-49b6-42c2-a057-c8a51e953054.json and https://artists.proofprofile.net/proofs/artist/8a68c140-49b6-42c2-a057-c8a51e953054.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blue Edition - Beethoven: Piano Sonatas Nos. 17, Op. 31 No. 2 & Nos. 18, Op. 31 No. 3
Franz Schubert - Impromptus Op. 90 and Op. 142
Ludwig van Beethoven: Sonata for piano Nos. 16, 17, 18, 19
Ludwig van Beethoven: Sonata for piano No. 26 - Op. 81a, No. 29 - Op. 106
Green Edition - Beethoven: Piano Sonata No. 17 "The Tempest" & 6 String Quartets, Op. 18 No. 2
Green Edition - Beethoven: Piano Sonata No. 17, Op. 31, No. 2 & 6 String Quartets, Op. 18, No. 1
Red Edition - Beethoven: Grosse Fuge, Op. 133 & Piano Sonata No. 17 "The Tempest"
Red Edition - Beethoven: Piano Sonata No. 17 & String Quartett No. 15
Blue Edition - Beethoven: Piano Sonata No. 17 "The Tempest" & Piano Sonatas Nos. 1, 12
Red Edition - Beethoven: Piano Sonata No. 17, Op. 31 No. 2 & Piano Concerto No. 1, Op. 15
Red Edition - Beethoven: Piano Sonata No. 1, Op. 2 No. 1 & Piano Sonata No. 17, Op. 31 No. 2
Piano Sonata No. 17 in D Minor, Op. 31 No. 2 "The Tempest": III. Allegretto
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 0xdbccb670903eccf798b8f0a470f22793fd7ca0194fe251cf6e07b45696ae0dac. 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/DE0851511410.
Blue Edition - Schumann: Kinderszenen & Overture, Scherzo and Finale for Orchestra
Yellow Edition - Beethoven: Piano Sonata No. 17, Op. 31 No. 2 & String Quartet No. 11, Op. 95
Yellow Edition - Beethoven: Piano Sonata No. 17, Op. 31 No. 2 & String Quartet No. 10, Op. 74
Classical Selection - Beethoven: Piano Concerto No. 5 "Emperor" & Piano Sonata No. 17 "The Tempest"
Green Edition - Schumann: Kinderszenen Op. 15 & Violin Concerto, WoO 23
Los Grandes de la Musica Clasica - Franz Schubert Vol. 2
The Classical Collection - Schumann - Leyendas Románticas
The Classical Collection - Schubert - Obras maestras románticas
The Classical Collection - Chopin - Clásicos Románticos
Los Grandes de la Musica Clasica - Ludwig van Beethoven Vol. 2
Tchaikovsky - Symphonie Nº 6 - Overture Solennelle "1812"
Green Edition - Schumann: Kinderszenen Op. 15 & 6 Studien in kanonischer Form, Op. 56
Green Edition - Schumann: Cello Concerto, Op. 129 & Kinderszenen, Op. 15
Classic for You: Famous Masterpieces from Great Masters
Klaviersonate in A Major, K. 331, Nr. 11: Rondo alla Turca
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Sechs musikalische Sätze für Klavier, Op. 94, Nr. 3: Moment Musical
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Klaviersolo in A Major, WoO 10: Barcarolle
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Klaviersolo " Kinderszenen " , Op. 15, Nr. 7: Träumerei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c1c4c8d846dfbcf61adc91ce41eab827b7a1a70fb40bf888865488a628e08f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEA541200970.
Prelude für Klavier in E Minor, Op. 28, Nr. 4
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Drei Walzer für Klavier in C-Sharp Minor, Op. 64, Nr. 2: Walzer Nr. 7
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Große Sonate für Klavier in G Minor, Op. 37: Barcarolle June
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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
Piano Sonata No. 14 in C-Sharp Minor, Op. 27/2 "Moonlight": I. Adagio sostenuto
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3 Gymnopédies: Gymnopedie No. 1 - Lent et douloureux
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5 Morceaux de Fantaisie, for piano, Op. 3: II. Prelude in C-Sharp Minor, "The Bells of Moscow"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c0d18b5333d5c7714dff16c09539299af4959ab33f0ec87bc22b301df3a035. 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/USZDG0601219.
Grandes Etudes de Paganini: No. 3: La Campanella
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Songs without Words, Book V, Op. 62: No. 30 in A Major "Spring Song"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200793623360ff02291c93ad8d0de0aedcfc17ea75d52bc4fb779e06e99294bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA580800166.
Piano Sonata No. 17 in D Minor, Op. 31/2 "Tempest": III. Allegretto
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Bagatelle for Piano in A Minor "Für Elise" WoO 59
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Ludwig Van Beethoven: Classical Dreams. Apassionata
Beethoven: Sonata for Piano No. 17 ''Tempest'', No. 23 ''Appassionata'' & No. 26 ''Les Adieux''
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c75857c639cf47794c7d827923bd0ada8242b11bbb4ff949220d53ddb272455. 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/AUV401448415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215aeb8969a9d985e10a6347fa7c6b27c7b23d2f6458326bce659a60e2a7181b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/AUV401448421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf12d3f2c825470adad661633888027124969597ba8ec3f345f4091af69bebce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUV401448422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe327eb84515a118db18c338c970ad99c612eba8e511857313a045b06e99f0b2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401448423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7a0a6dc4678905f63ed218fe383a30ed556043eaa584ebbd73310987bd8795. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUV401448427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f592a728f828452f62909d8c075d0dc96c119bbdb96ed1a52f983a6350124. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUV401448430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8147c0c7772ff974bacf5e81d6952cf254398e860e992d7c9fe5abdd6c8ae9dc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUV401448416.
Nocturne, B-Moll, op. 9, No. 1: Larghetto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa157532f5c5649923fef00a43a35b58693e849e07796807f2e1a58898907acf4. 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/DEA769906202.
Nocturne, Fis-Dur, op. 15, Nr. 2: Larghetto
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Nocturne, Cis-Moll, op. 27, Nr. 1: Larghetto
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Nocturne, Des-Dur, op. 27, Nr. 2: Lento sostenuto
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Nocturne, E-Moll, op. 72, Nr. 1: Andante
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Walzer, As-Dur, op. 69, Nr. 1: Tempo di Valse
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Beethoven - Piano Sonatas No. 17 "Tempest" - No. 26 "Les Adieux" - No. 21 "Waldstein"
Felix Mendelsohn Bartholdy: Die Italienische
Beethoven: Piano Sonatas Nos. 12, 17, 19 & 26 "Les Adieux"
Ludwig van Beethoven - Klavierkonzert Nr. 5
Vienna Master Series: Romantic Piano Music
The Most Relaxing Classical Music In The Universe
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Sonata No. 8 in C Minor for Piano, Op. 13, "Sonata Pathétique": II. Adagio cantabile
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Klaviermusik 50 Meisterwerke – Klassik die man hören muss
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Piano Sonata No. 11 in A Major, K. 331: III. Alla Turca
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Waltz No. 6 in D-Flat Major, Op. 64, No. 1 "Minute"
The Greatest Classical Collection Ever: 222 All Time Favorite Classics
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