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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f0c944a4935759c0cff759ea63116a4afa14c7468249ebe5eb12c6a5cd2f6. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). 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
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.
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]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e8b4f8c12e619d10efe0931aa441df6c0d324d91ca41411051fb22e546bb21. 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/FRZ209200011.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb333360b52999759077c151118071a44ece4ac2fd51766dfe9319130d2afa65d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA559606681.
Symphony No. 6 in A Minor "Tragic": I. Allegro energico, ma non troppo. Heftig aber markig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e1d4fef7647196216d68870e99d71dcd00f94784a0b378d532a2ec1701b08c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA559906671.
Symphony No. 1 in D Major "Titan": III. Feierlich und gemessen, ohne zu schleppen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d6bbaef534154db9c13bfa12df5158485c97f674361228a145cac44e5cb98. 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/DEA550205853.
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 957124 (2026-07-08T03:53:27Z), 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
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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843024d3203a326c8f063a3a114fa5b48b5e84875b8f34e497ce0bf3c12fe2d1. 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/DEA809105701.
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)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27789cfc6f248f7dac87ca6f0fc7d503d620f5488886055524a58f136bb85cf. 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/DEA809220502.
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869e3182cd3c98eb17a8128c58938596dcb181dad02ce3c24f32cfc71098cc7. 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/FRZ207100502.
Handel: Messiah, HWV 56, Pt. 2, Scene 7: Chorus. "Hallelujah"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdabf33af4f8d3e2afd7045f99037e68f7344a1020520e53ac305526e2f93358. 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/FRZ207403043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582a9a443ea0a6c72e6972fd85387beaf9520492005dacf896333e8b935853f. 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/DEA809412702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e8b4f8c12e619d10efe0931aa441df6c0d324d91ca41411051fb22e546bb21. 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/FRZ209200011.
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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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005dae4bd0a342e689628ee6b552823cba890f30b17c81ca1a420661c87a782. 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/GBELP0790023.
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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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2775bb9542193e54bcfeebeb4aef26a75d750f59c88173380ff1aaf8634dcba4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBELP0790021.
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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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b6f1eb47399bc01b16825a292bac1aea0e96632ddef8c1218593c01446ec6d. 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/DEA807201400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee8dc43b73737bf6dc6adda557a06a97ab8c5c3100f032e8ddcf1d671f2100. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ208300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaedfaa282b4a9761c1231742ce61628e4d0a66b3244c0739d9581f11f8c02bf. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEA809004612.
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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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93b5a44c50976f1e04b1b0f889e17b112d2db339d651fa7b8ecfab6ec087a8c. 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/FRZ207508710.
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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. 3, Scherzo
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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. 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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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: VIII. Lacrimosa
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Mozart: Requiem in D Minor, K. 626: X. Hostias
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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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Elektra, Op. 58: "Allein! Weh, ganz allein."
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Elektra, Op. 58: "Was willst du? Seht doch dort!"
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Zemlinsky: Lyric Symphony; Sinfonische Gesänge
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Marc, Alessandra: Arias (Opera Gala) -Bellini, V. / Donizetti, G. / Hofmannsthal, H. / Barber, S. / Puccini, G.
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