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 0x743186b91ddb17b8615b3741e6b8c83685ba097a8698f12c194df1b75402b054. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b7fe264-f6f9-461f-a7e5-d67702019b94.json and https://artists.proofprofile.net/proofs/artist/8b7fe264-f6f9-461f-a7e5-d67702019b94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Traviata, Act I: Brindisi - "Libiamo ne' lieti calici" (Instrumental Version)
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 0x9166d106b6bf020af045b7c2c31e655621096fff62d45fe97aa9b45eb128ef09. 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/US5541404100.
The Magic Flute, K. 620, Act I: Papageno's Aria - "Der Vogelfänger bin ich ja" (Instrumental Version)
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Soprano Love Arias: 50 Must-Have Opera Classics
Nesun Dorma - Vesti la guiba and Other Opera Blockbusters
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5e1f58bff4e34940ab3b72a86fcb7bac526ba95fd3a8d55663cc117f5826e1. 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/USSJ10813568.
Meditation: Classic Care - Music for Healthy Living for Calming Reflection & Quiet Time
Classical Stress Relief: 99 Must-Have Classical Meditation & Relaxation
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8f893852290c3b276f307d793a99d262194064c98b4259365e219409e2080. 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/US5541602855.
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Tosca, Act III: "E lucevan le stelle" (Instrumental Version)
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Classical Masterpieces of the Millennium
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100 Must-Have History of Classical Music
100 Must-Have Amour Romantic Love Song Classics
100 Must-Have Valentine's Day Love Song Classics
Classic á la Carte: International Dinner Party - Classical Music for Dining and Entertaining
150 Must-Have Classical Journey Around the World
String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto "The Celebrated Minuet"
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e1719185c74cc5a32dd4a08f1840e07cd40cba779ea6411b5e9b9a99729b9. 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/US5541302514.
The Four Seasons - Concerto No. 4 in F Minor, Op. 8, RV 297 "Winter": II. Largo
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Classic Moods - Mozart, W.A. / Handel, G.F. / Donizetti, G. / Puccini, G. / Bellini, V. / Ponchielli, A. / Tchaikovsky, P.I. / Lortzing, A.
Le nozze di Figaro, K. 492, Act II: "Voi che sapete"
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The Barber of Seville, Act I: "Largo al factotum"
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Orfeo ed Euridice, Wq. 30, Act II, Scene 2: Ballo. Andante "Dance of the Blessed Spirits"
Südwestdeutsches Kammerorchester Pforzheim
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Carmen, WD 31, Act I: Habanera. "L'amour est un oiseau rebelle"
Bulgarian National Radio Symphony Orchestra
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La traviata, Act I: "Libiamo ne'lieti" (Brindisi )
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The Darkside of Classical Music: Dark, Scary & Haunting Classics
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Klassik für Jedermann: Galakonzert der Tenöre
Der Liebestrank, Act II: Arie des Nemorino, "Una furtiva lagrima"
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The Marriage of Figaro, K. 492: Overture
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100 Must-Have Composers of Classical Music
The Bird Seller: Introduction and Waltzes
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Hungarian Rhapsody No. 2 in C-Sharp Minor, S. 244
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The History of Romantic Era Music (100 Famous Songs)
Атанасов: Гергана - Чайковски: Евгений Онегин
Международен конкурс за млади оперни певци, София, 1973
Ballet Highlights - Tchaikovsky, P.I. / Ponchielli, A. / Berlioz, H. / Chopin, F. / Khatchaturian, A. / Delibes, L. (Great Ballet Classics)
La Gioconda, Act III: Dance of the Hours
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Gianni Schicchi: O mio babbino caro (Instrumental Version)
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Tosca, Act I: Recondita armonia (Instrumental Version)
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Madama Butterfly, Act I: Viene la sera (Instrumental Version)
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La Boheme, Act I: Che gelida manina (Instrumental Version)
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Turandot, Act I: Non piangere, Liu (Instrumental Version)
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Turandot, Act I: Signore, ascolta (Instrumental Version)
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Tosca, Act III: E lucevan le stelle (Instrumental Version)
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Turandot, Act I: Moon Chorus - "Gira la cote"
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Turandot, Act III: Nessun dorma (Instrumental Version)
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Madama Butterfly, Act II: Humming Chorus
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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
La mayoría de las arias hermosas de la ópera
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An Italian in Algiers - Aria Isabella - Cruda Sorte
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La Cenarentola - Aria Angelina Act II - Nacqui all affanno
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The Magic Flute, KV 620: Act I: "Papagena! Papageno!"
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Les dragons d'Alcala, Prélude 2. Akt, Danse Bohème, 2. Akt
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2014 Sochi Winter Olympics Opening Ceremony Highlights