Alessandra Marc, born Judith Borden (born July 29, 1957) is an American dramatic soprano who has appeared at many of the world's opera houses and orchestras.Alessandra Marc, Thrilling in 'Russian Musi
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 0xae3f0c944a4935759c0cff759ea63116a4afa14c7468249ebe5eb12c6a5cd2f6. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cdc09ea-5da8-4943-b290-f197f81efc65.json and https://artists.proofprofile.net/proofs/artist/6cdc09ea-5da8-4943-b290-f197f81efc65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Walküre, WWV 86B / Act 1: Orchestervorspiel
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 0x25513ee30ca9d56ff765bb9c1178c5946ddccff0e2ded38f09e928ed1c074ab5. 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/GBF079244301.
Die Walküre, WWV 86B / Act 1: "Schläfst du, Gast?...Der Männer Sippe saß hier"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1564e1f19ebefc99d939496fb2060c28124df31250436d7013f2a63f58c23877. 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/GBF079244309.
Die Walküre, WWV 86B / Act 1: "Du bist der Lenz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d11ffe03d45619cbde8eb11d98222b5378dbd62c699bac777389be88a1eb6. 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/GBF079244311.
Die Walküre, WWV 86B / Act 1: "Wehwalt heißt du fürwahr?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450ac12c539df1ce3bf6e6c4aff7055eb819a67aaa950f64bb02e11165cd659. 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/GBF079244312.
Die Walküre, WWV 86B / Act 3: Vorspiel..."Hojotoho! Hojotoho!" (Ride of the Valkyries)
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Jonny spielt auf, op.45 / Scene 1: Du schöner Berg, der mich anzieht
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Jonny spielt auf, op.45 / Scene 3: Oh, das ist mein Jonny!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17ae73cf9429af24d5447cbdca7c9b1d99b89202384a71cd67d711779b5f511. 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/GBF079142706.
Opera Gala - 35Th Anniversary (A Tribute To Delos Founder Amelia S. Haygood)
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - "O Freunde, nicht diese Töne!" (Ode to Joy) [Excerpt]
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Michael Gielen Edition, Vol. 6: Mahler Symphonies & Orchestral Song Cycles (Recorded 1988-2014)
Symphony No. 1 in D Major "Titan": I. Langsam. Schleppend - Im Anfang sehr gemächlich
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Symphony No. 2 in C Minor "Resurrection": II. Andante moderato
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Symphony No. 3 in D Minor: I. Kräftig. Entschieden
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Symphony No. 6 in A Minor "Tragic": I. Allegro energico, ma non troppo. Heftig aber markig
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Symphony No. 6 in A Minor "Tragic": IV. Finale. Allegro moderato - Allegro energico
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Symphony No. 7 in E Minor: I. Langsam - Allegro risoluto, ma non troppo
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Symphony No. 1 in D Major "Titan": III. Feierlich und gemessen, ohne zu schleppen
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Symphony No. 4 in G Major: III. Ruhevoll. Poco adagio
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Symphony No. 2 in C Minor "Resurrection": V. Finale. Im tempo des scherzos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456c182c2a3ede6fda09c61ef85fb343a9bd97cb1df1b29b25d0d89de4af446. 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/DEA559606684.
Symphony No. 2 in C Minor "Resurrection": I. Allegro maestoso
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Symphony No. 3 in D Minor: VI. Langsam. Ruhevoll. Empfunden
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Orff: Carmina Burana, Introduction, Fortuna Imperatrix Mundi: O Fortuna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5cae17545d5319766310f2eb5eaeda4fbd74bf5a10b170d7e7d2b033461695. 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/DEA809201401.
Wagner: Die Walküre, Act 3: The Ride of the Valkyries
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Verdi: Nabucco, Act 3: "Va, pensiero" (Chorus of The Hebrew Slaves)
Orchestra dell'Accademia Nazionale di Santa Cecilia
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Elgar: 5 Pomp and Circumstance Marches, Op. 39: No. 1 in D Major
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Bach, JS: Toccata and Fugue in D Minor, BWV 565: Toccata
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Beethoven: Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
Philharmonisches Staatsorchester Hamburg
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Handel: Coronation Anthem No. 1, HWV 258 "Zadok the Priest"
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Puccini: Turandot, Act 3: "Nessun dorma" (Calaf)
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Strauss, R: Also sprach Zarathustra, Op. 30: Introduction
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Prokofiev: Romeo and Juliet, Op. 64, Act 1, Scene 2: No. 13, Dance of the Knights
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Tchaikovsky: 1812 Overture in E-Flat Major, Op. 49 (Excerpt)
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Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
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Handel: Messiah, HWV 56, Pt. 2, Scene 7: Chorus. "Hallelujah"
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Holst: The Planets, Op. 32: I. Mars, the Bringer of War
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Mussorgsky: Pictures at an Exhibition: I. Promenade
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Saint-Saëns: Symphony No. 3 in C Minor, Op. 78 "Organ Symphony": II. (b) Maestoso - Allegro
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Verdi: Aïda, Act 2: "Gloria all'Egitto, ad Iside" (Chorus - Triumphal Scene)
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Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto
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Holst: The Planets, Op. 32: IV. Jupiter, the Bringer of Jollity (Excerpt)
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Elgar: Variations on an Original Theme, Op. 36 "Enigma": Variation IX. Nimrod
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Vaughan Williams: Fantasia on Greensleeves
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Binge: Sailing By (Radio 4, Shipping Forecast theme)
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Coates: By the Sleepy Lagoon (Instrumental Version)
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Wood, Arthur : My Native Heath : IV Barwick Green [The Archers theme]
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Wood, Henry : Fantasia on British Sea Songs : Sailor's Hornpipe [Excerpt]
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Sibelius: Karelia Suite, Op. 11: I. Intermezzo
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Charpentier: Te Deum, H. 146: I. Prélude
Orchestra of the Gulbenkian Foundation, Lisbon
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Verdi : Il Trovatore : Act 2 "Vedi! le fosche" [Chorus] - 'Anvil Chorus'
Chorus of the National Academy of Saint Cecilia
Orchestra of the National Academy of Saint Cecilia
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Khachaturian : Gayaneh Suite No.3 : V Sabre Dance
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Mahler: Symphony No. 8 in E-Flat Major / Schoenberg: Jakobsleiter (Die)
Part, A.: Cantus in Memoriam Benjamin Britten / Allegri, G.: Miserere / Webern, A.: Langsamer Satz (Secret Classics)
Bernstein: Symphonic Dances from West Side Story: No. 1, Prologue
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Bernstein: Symphonic Dances from West Side Story: No. 2, Somewhere
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Bernstein: Symphonic Dances from West Side Story: No. 3, Scherzo
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Bernstein: Symphonic Dances from West Side Story: No. 4, Mambo
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Bernstein: Symphonic Dances from West Side Story: No. 5, Cha-cha
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Bernstein: Symphonic Dances from West Side Story: No. 6, Meeting Scene
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Bernstein: Symphonic Dances from West Side Story: No. 7a, Cool
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Bernstein: Symphonic Dances from West Side Story: No. 7b, Fugue
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Bernstein: Symphonic Dances from West Side Story: No. 8, Rumble
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Bernstein: Symphonic Dances from West Side Story: No. 9, Finale
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Berlioz: Symphonie fantastique, Op. 14, H 48: II. Un bal. Valse
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Mozart: Le nozze di Figaro, K. 492: Overture
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Ravel: Pavane pour une infante défunte, M. 19
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Beethoven: Symphony No. 8 in F Major, Op. 93: I. Allegro vivace e con brio
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Beethoven: Symphony No. 8 in F Major, Op. 93: II. Allegretto scherzando
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Beethoven: Symphony No. 8 in F Major, Op. 93: III. Tempo di menuetto
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Beethoven: Symphony No. 8 in F Major, Op. 93: IV. Allegro vivace
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Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo (Live)
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Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: II. Allegretto con moto (Live)
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Saint-Saëns: Cello Concerto No. 1 in A Minor, Op. 33: III. Molto allegro (Live)
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Wagner: Götterdämmerung, Prologue: Prelude
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Wagner: Götterdämmerung, Prologue: Siegfried's Rhine Journey
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec895ae701f768d680ee685fe29cca058748de94253f58aa982ec26e26c166f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEA809115327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3195b5c90b5969ef24a9f25c7673dc4e4f1edcb186fdabf1e3ad2a1e77ac60. 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/DEA809115346.
Wagner: Götterdämmerung, Act 3: Funeral March
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Tchaikovsky: Symphony No. 5 in E Minor, Op. 64: III. Valse. Allegro moderato
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c73d7501b06ce71543be47f85bbf536a5581532ce6b54b232ff004570fce0b7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEA809938000.
Beethoven: Fidelio, Op. 72, Act 1: Marsch
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Mozart: Così fan tutte, K. 588: Overture
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Mozart: Requiem in D Minor, K. 626: I. Introitus
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Mozart: Requiem in D Minor, K. 626: II. Kyrie
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Mozart: Requiem in D Minor, K. 626: III. Dies irae
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Mozart: Requiem in D Minor, K. 626: IV. Tuba mirum
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Mozart: Requiem in D Minor, K. 626: V. Rex tremendae
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Mozart: Requiem in D Minor, K. 626: VI. Recordare
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Mozart: Requiem in D Minor, K. 626: VII. Confutatis
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Mozart: Requiem in D Minor, K. 626: VIII. Lacrimosa
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Mozart: Requiem in D Minor, K. 626: IX. Domine Jesu Christe
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Mozart: Requiem in D Minor, K. 626: X. Hostias
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Mozart: Requiem in D Minor, K. 626: XI. Sanctus
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Mozart: Requiem in D Minor, K. 626: XII. Benedictus
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Mozart: Requiem in D Minor, K. 626: XIII. Agnus Dei
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Mozart: Requiem in D Minor, K. 626: XIV. Communio
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Beethoven: Symphony No. 1 in C Major, Op. 21: I. Adagio molto - Allegro con brio
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Beethoven: Symphony No. 1 in C Major, Op. 21: II. Andante cantabile con moto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c4035ecca1762f1e0969968102a60b518daf2db5a5e12b373f669c099f6d1. 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/GBF079310741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb48af2e66e04a3713e4540ec246314e703de31b6219283254d0aa556c09449. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEF059531601.
Elektra, Op. 58: "Orest! Orest ist tot!"
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Elektra, Op. 58: "Allein! Weh, ganz allein."
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439804c77dcb16287937e31802f64d0186c988c49848068af19cd19de9e7925. 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/DEF059531607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f7c4760444698ee8174069696e30640432b65121947b7f0e6322f8393188d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEF059531603.
Elektra, Op. 58: Orest! Orest! Es rührt sich niemand!
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Elektra, Op. 58: "Was willst du? Seht doch dort!"
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Elektra, Op. 58: Es muss etwas geschehen sein
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Elektra, Op. 58: "Ich habe keine guten Nächte."
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed8e70f1607272bf8fa1800cfc2f11ef735b2e47046a0a9bf74936c96f24dfd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059531610.
Zemlinsky: Lyric Symphony; Sinfonische Gesänge
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Marc, Alessandra: Arias (Opera Gala) -Bellini, V. / Donizetti, G. / Hofmannsthal, H. / Barber, S. / Puccini, G.
Die Agyptische Helena, Op. 75, TrV 255, Act II: Zweite Brautnacht! Zaubernacht
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Marc, Alessandra: Arias - Verdi, G. / Catalani, A. / Cilea, F. / Puccini, G. / Charpentier, G. / Wagner, R.
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Barenboim & Chicago Symphony Orchestra - The Erato-Teldec Recordings, Vol.3