thumb|Maria Stader on Rigi-Kaltbad, New Year 1965200px|alt=Maria Stader's signature Maria Stader (November 5, 1911 – April 27, 1999) was a Hungarian-born Swiss lyric soprano, known particularly for he
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 0x999a7acb9e1b511c587ef22b7c31004a93a149ca94d57c841aaa621cc3ed1e3e. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/327c9b0d-8bc6-4666-a3bc-bf1bbe3b1f6e.json and https://artists.proofprofile.net/proofs/artist/327c9b0d-8bc6-4666-a3bc-bf1bbe3b1f6e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Excerpts From The Merry Wives Of Windsor
Dvořák: Requiem (Karel Ančerl Edition, Vol. 6)
Requiem, Op. 89, B. 165, Pt. 1: VII. Confutatis maledictis
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
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Requiem, Op. 89, B. 165, Pt. 1: I. Requiem aeternam
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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
Requiem, Op. 89, B. 165, Pt. 1: II. Graduale
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Requiem, Op. 89, B. 165, Pt. 1: III. Dies irae
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Requiem, Op. 89, B. 165, Pt. 1: IV. Tuba mirum
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Requiem, Op. 89, B. 165, Pt. 1: V. Quid sum miser
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Requiem, Op. 89, B. 165, Pt. 2: IX. Offertorium
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Maria Stader / Chor der St.Hedwigs-Kathedrale / Berliner Philarmoniker / Igor Markevitch play: Wolfgang Amadeus Mozart: Missa [Nr. 14], Krönungsmesse, KV 317
Czech Philharmonic Orchestra / gem. Chor und Orchester spielen: Antonín Dvořák: Requiem fuer Soli 5
Czech Philharmonic Orchestra / gem. Chor und Orchester spielen: Antonín Dvořák: Requiem fuer Soli 2
Bruckner: Grosse Messe Nr.3; drei Motetten
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Verdi: La traviata (Hans Schmidt-Isserstedt Edition 2, Vol. 11)
Herz und Mund und Tat und Leben, BWV 147: II. Recit. Gebenedeiter Mund! (Tenor)
Solistengemeinschaft Der Bachwoche Ansbach
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Herz und Mund und Tat und Leben, BWV 147: III. Aria. Schäme dich, o Seele nicht (Alto)
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Herz und Mund und Tat und Leben, BWV 147: X. Chorale. Jesus bleibet meine Freude
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Magnificat in D Major, BWV 243: I. Chorus: "Magnificat"
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Magnificat in D Major, BWV 243: VII. Chorus: "Fecit potentiam"
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Magnificat in D Major, BWV 243: XII. Chorus: "Gloria Patri"
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Bach, J.S.: Cantata BWV 140, Magnificat BWV 243
Wachet auf, ruft uns die Stimme, Cantata BWV 140: I. "Wachet auf, ruft uns die Stimme"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: II. "Er kommt, er kommt, der Bräutigam kommt!"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: III. "Wann kommst du, mein Heil?"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: IV. "Zion hört die Wächter singen"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: V. "So geh herein zu mir"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: VI. "Mein Freund ist mein!"
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Wachet auf, ruft uns die Stimme, Cantata BWV 140: VII. "Gloria sei dir gesungen"
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Magnificat in D Major, BWV 243: II. Aria: "Et exsultavit spiritus meus"
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Magnificat in D Major, BWV 243: III. Quia respexit...4. Omnes generationes
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Magnificat in D Major, BWV 243: V. Aria: "Quia fecit mihi magna" (bass)
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Magnificat in D Major, BWV 243: VI. Aria (Duet): "Et misericordia" (alto, tenor)
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Magnificat in D Major, BWV 243: X. Chorus: "Suscepit Israel"
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Magnificat in D Major, BWV 243: XI. Chorus: "Sicut locutus est"
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Mahler: Symphony No. 2 "Resurrection" - Nan Merriman Recitals
Johann Sebastian Bach: Cantata BWV 51 Jauchzet Gott In Allen Landen - Hochzeitskantate, BWV 202 Weichet Nur, Betrübte Schatten
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Afferentur regi virgines (Motet), WAB. 1
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Te Deum, WAB. 45: V. In te, Domine, speravi
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Psalm 150, for Soprano, Chorus and Orchestra, WAB. 38
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Brahms: Ein deutsches Requiem (Mono Version)
Mozart: Don Giovanni, Extracts (Stereo Version)
Mozart: Le nozze di Figaro (Mono Version)
Mozart: La flûte enchantée, version abrégée (Mono Version)
Singers of the Century: Maria Stader Sings Mozart (2019 Remaster)
Süßer Die Glocken Nie Klingen (Classical German Christmas Songs)
In Dulci Jubilo: Maria Stader Sings European Songs
Brahms: Ein deutsches Requiem, Op. 45 (Live)
Mozart: Eine kleine Nachtmusik & Mahler: Symphony No. 4
Maria Stader singt Kantaten von Johann Sebastian Bach
Bruckner: Messe No. 3 (1868 Version, Mono Version)
Maria Stader singt aus Oratorien (Stereo Version)
Arien von Wolfgang Amadeus Mozart (Mono Version)
Maria Stader singt aus Oratorien (Mono Version)
Mozart: Messe in C Minor, K. 427 "Grosse Messe" (Mono Version)
Mozart: Grosse Messe, K. 427 (Stereo Version)
Bach: Cantates BWV 51 & BWV 202 (Stereo Version)
Bach: Cantates BWV 51 & 202 (Mono Version)
Verdi: La traviata (German Version, Stereo Version)
Mozart: Die Entführung aus dem Serail (Short Version, Mono Version)
Beethoven: Missa solemnis (Mono Version)
Mass in D, Op. 123 "Missa Solemnis" / 5. Agnus Dei - Adagio: Dona nobis pacem
12 Contredanses, Stage Music & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488f32115b538486061d669ae6f7a7c8afd77e0082889df6f475dbaea958c6c. 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/DEF055500025.
Mass In D, Op. 123 "Missa Solemnis" / 1. Kyrie - Assai sostenuto (Mit Andacht): Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b0e8a4bd1cd4297c0e2fab95dd80f69167dc1fb077138cad8c60dc97675252. 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/DEF055502717.
Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: Quoniam tu solus Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dac5835c127b5876e9520849f0033390cd5e567551dde78469d2334d0d5fe80. 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/DEF055500012.
Mass In D, Op. 123 "Missa Solemnis" / 2. Gloria - Allegro vivace: "Amen, Amen, in gloria Dei Patris" / "Quoniam tu solus..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f20728e6e36f4fa1b6efc92dd51295acd74eaa4b427d4a91dc8e929b897f67. 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/DEF055500014.