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 0x9cfc7c4542898517eb2527c94965efbfa64c6110b27ce391e139da523a507cf5. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eeb6c82e-22eb-4b03-ad74-d9994db6e416.json and https://artists.proofprofile.net/proofs/artist/eeb6c82e-22eb-4b03-ad74-d9994db6e416.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The 99 Most Essential Pieces of the Romantic Era
The 99 Most Essential Pieces of Classical Music
Canon and Gigue in D Major, P. 37: I. Canon
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 0x1f7de4835953bc74808e9e1adc664ca400ea8e379505681490daeecce010e96d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:04:34Z), 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/SEWDL9750007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe69484264ade3528d47ce916a8a287556208d5f9346d30ec0f1605bec763ff4. 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/SEWDL9750020.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight": I. Adagio sostenuto
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21 Hungarian Dances, WoO 1: No. 5, Allegro in F-Sharp Minor
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14 Romances, Op. 34: No. 14, Vocalise (Lentamente)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9baac788d25cb8d455010730f701f58d6cdff1059b298c870a827a24484cf48. 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/SEWDL9750041.
Slavonic Dances, Series II, Op. 72: Mazur - Allegretto grazioso
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Sonatina, Op. 100: Scherzo. Molto vivace
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Strauss: Der Rosenkavalier - Saint-Saëns: Samson and Dalila - Puccini: Tosca
La Boheme, Act I: "Si, mi chiamano Mimi" (Mimi)
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Giuseppe Verdi - Géniové světové hudby V.
Serenade for Strings in E Major, Op. 22: IV. Larghetto
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The Kiss, JB 1:104, Act I, Scene 5: "No, I Say, Leave Me Be!" (Vendulka, Lukáš)
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The Kiss, JB 1:104, Act II, Scene 9: "It’s Him! It’s Her!" (Father Paloucký, Vendulka, Tomeš, Martinka, Matouš, Barče)
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Vilém Přibyl - Artistic Portrait - Opera Arias
The 99 Most Essential Classical Pieces in Movies
Peer Gynt Suite No. 1, Op. 46: In the Hall of the Mountain King (from Scoop)
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Requiem, K. 626: Lacrimosa dies illa (from The Big Lebowski)
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Rinaldo, HWV 7: "Lascia ch'io pianga" (from Antichrist)
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Cantata, BWV 147, "Herz und Mund und Tat und Leben", Part 2: X. Chorale: "Jesu bleibet meine Freude" (Jesu, Joy of Man's Desiring)
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Adagio in G Minor for Strings and Organ, "Albinoni's Adagio"
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Rigoletto: "La donna e mobile" (from Captain Corelli's Mandolin)
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Lilka Ročáková, Ivanka Malinová, Pavel Kanas (Mozart, Rossini, Verdi, Bizet, Puccini, Tchaikovsky, Leoncavallo, Smetana, Dvořák)
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Swan Lake Suite, Op. 20: Scène (Lake in the Moonlight)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b360a0362564224aaa3e912deee5bfe9b5a8b4f26d184e74f5923893a75bcc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEWDL6018036.
Symphony No. 5 in C Minor, Op. 67, "Fate": Allegro con brio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ebe37c3002211a3e6f84daf0584b7e009bd8c92270218fd77178a3d09b826d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a29329382218841b0fd93dd901d4ac7be4bc1b2a7fb3d46bfc4a2b71c4e21c. 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/DEB790300751.
Brandenburg Concerto No. 3 in G Major, BWV 1048: Allegro
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Vocalise for Cello and Piano, Op. 34: Lentamente
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An der schönen blauen Donau (On the Beautiful Blue Danube), Op. 314
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Serenade No. 13 in G Major, K. 525, "Eine Kleine Nachtmusik": Allegro
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Concerto No. 21 in C Major for Piano and Orchestra, K. 467: Andante
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7de4835953bc74808e9e1adc664ca400ea8e379505681490daeecce010e96d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL9750007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf41c1a45e861768cd9509fbdf67a91f7e66817babcac502f256a204f8121b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SEWDL0759304.
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Peer Gynt Suite No. 1, Op. 46: Morning Mood
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Sonata No. 14 in C-Sharp Minor for Piano, Op. 27:2, "Moonlight Sonata": Adagio sostenuto
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Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 1 in E Major, RV 269, "La primavera" (Spring): I. Allegro
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Orchestral Suite No. 3 in D Major, BWV 1068: Air
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Symphony No. 40 in G Minor, K. 550: Allegro molto
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Samson et Dalila, Op. 47, Act 2: "Mon coeur s'ouvre a ta voix"
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Bagatelle in A Minor, WoO 59, "Für Elise"
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Liebestraum No. 3 in A-Flat Major, G 541, Op. 62: "O lieb so lang' du lieben kannst"
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The Well-Tempered Clavier: Prelude No. 1 in C Major, BWV 846
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Hungarian Rhapsody No. 2 in C-Sharp Minor, S. 244
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Concerto in B Minor for Cello and Orchestra, Op. 104, B. 191: III. Finale: Allegro moderato
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Pelléas et Mélisande: Sicilienne, Op. 78
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Concerto No. 1 in E-Flat Major for Piano and Orchestra, S. 124: I. Allegro maestoso - Tempo giusto
Orquestra Sinfônica do Estado de São Paulo
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Die Walkürie (The Valkyrie), Act 3: Ride of the Valkyries
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Songs Without Words, Op. 62: No. 6 in A Major, "Spring Song"
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Le quattro stagioni (The Four Seasons), Op. 8 - Concerto No. 4 in F Minor, RV 297, "L'inverno" (Winter): II. Largo
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The Planets, Op. 32: I. Mars, the Bringer of War
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Prelude No. 15 in D-Flat Major, Op. 28, "Raindrop"
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Nabucco: Chorus of the Hebrew Slaves, "Va pensiero, sull'ali dorate"
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Divertimento in D Major, K. 136, "Salzburg Symphony No. 1": I. Allegro
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Pomp and Circumstance, Op. 39: Land of Hope and Glory
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Morceaux de Fantasie, Op. 3: Prélude in C-Sharp Minor
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Symphony No. 9 in D Minor, Op. 125, "Choral": An die Freude
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Nabucco, Act III: Chorus of the Hebrew Slaves "Va pensiero, sull'ali dorate"
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Eva Randová. Verdi, Mascagni, Wagner, Čajkovskij, Dvořák
Cecilie Strádalová (Mysliveček, Mozart, Verdi, Delibes, Gounod, Leoncavallo, Puccini, Martinů)
Magdalena Blahušiaková, Jaroslav Souček (Smetana, Janáček,Verdi, Foerster, Rossini)
Beethoven, Verdi, Smetana, Fibich, Wagner, Leoncavallo, Dvořák
Hanuš: Plameny - Horký: Hejtman Šarovec - Krejčí: Poslední hejtman - Blažek: Verchovina