Eberhard Büchner (born 6 November 1939 in Dresden) is a German operatic and concert tenor. He made his debut in 1964 as Tamino in Mozart's Die Zauberflöte at the Mecklenburg State Theatre. Recording
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 0xe1e228bfe5f705ce39c37745fd4216e3b9335e7b1226f976f0054e94036aafa2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f3f9edc-07cd-46c7-8f13-bf0cd2b2d94b.json and https://artists.proofprofile.net/proofs/artist/4f3f9edc-07cd-46c7-8f13-bf0cd2b2d94b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn Bartholdy: Die Erste Walpurgisnacht / Infelice / Ouverture zum Marchen von der schonen Melusine
J.S. Bach: The Great Choral Masterpieces
Tristan und Isolde (1988 Digital Remaster), Act III, Scene III: Mild und leise wie er lächelt (Isoldes Liebestod)
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 0x24404e023feb67ec822f113ddf2f47a0b0356e09523c806f86fd390b3d1f326d. 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/GBAYC8804784.
Carlos Kleiber - Complete Recordings on Deutsche Grammophon
Schubert: Die Freunde von Salamanka, D. 326; Der Spiegelritter, D. 11
Die Freunde von Salamanka, D. 326, Act I: No. 5, Trio. Lebensmut und frische Kühlung
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Die erste Walpurgisnacht, Op. 60, Ouvertüre: I. Das schlechte Wetter (Allegro con fuoco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f1b8a03661f7165f1ef4ecdc020e9e3be0abcc29fd97b9519b4fc0d6b49567. 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/NLY331507087.
Die erste Walpurgisnacht, Op. 60: I. Es lacht der Mai (Allegro vivace non troppo) - a Druid
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Die erste Walpurgisnacht, Op. 60: II. Könnt ihr so verwegen handeln (Allegretto non troppo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2120cba15d5d751ab232b6bcbbb7524d95c32ac1ec463b0881ee28ca8ebaefb3. 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/NLY331507090.
Die erste Walpurgisnacht, Op. 60: III. Wer Opfer heut' zu bringen scheut (Andandte maestoso)
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Die erste Walpurgisnacht, Op. 60: IV. Verteilt euch, wack're Männer, hier (Allegro leggiero)
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Die erste Walpurgisnacht, Op. 60: VI. Kommt mit Zacken und mit Gabeln (Allegro molto)
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Die erste Walpurgisnacht, Op. 60: VII. So weit gebracht, daß wir bei Nacht (L'istesso tempo. Andante maestoso)
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Die erste Walpurgisnacht, Op. 60: VIII. Hilf, ach hilf mir, Kriegsgeselle (Allegro non troppo)
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Die erste Walpurgisnacht, Op. 60: IX. Die Flamme reinigt sich vom Rauch (Andante maestoso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd3fbbef658b8694e82b2ce09390e05f1cc046dd33dda3daa83d6d7d63ad2ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLY331507097.
Mozart: Complete Edition Box 17: Theatre & Ballet Music
Bach: Thomanerchor Leipzig (Legendary recordings)
Mozart 225 - Works Of Doubtful Authenticity
Goldene Operette / Der Zigeunerbaron & Der Vetter Aus Dingsda: Großer Querschni
Tristan und Isolde, Act I: Westwärts schweift der Blick
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Tristan und Isolde, Act I: Frisch weht der Wind der Heimat zu
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Tristan und Isolde, Act I: Weh, ach wehe! Dies zu dulden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcbb348bbdf99464fb6456ad736a8f78178de06e0d216541337e8d588f34f4. 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/DEF058134910.
Tristan und Isolde, Act I: Auf! Auf! Ihr Frauen!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b8b095795b3809681ff4efe246053fa628b6dff820d47f3f90d9d0aac400e8. 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/DEF058134911.
Tristan und Isolde, Act I: Herr Tristan trete nah! - Begehrt, Herrin, was Ihr wünscht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856d6d2b48329b095c1ae80a7c10d167c101bf449528cbacb661e5f44cc07c33. 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/DEF058134903.
Tristan und Isolde, Act I: Tristan! - Isolde! Treuloser Holder!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85c140dafcc8e87699f3f98fffb83f62c3061290285306f557ea625141e2b94. 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/DEF058134912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64347b39e489e054532efb77bb80dddc339a6603eb8ce5cc6d61eb52debae38. 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/DEF058134913.
Tristan und Isolde, Act II: Hörst du Sie noch?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03dc44e95babb579fc840b368ab722144efe8f3c05b7a6af615d1217f8b741b. 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/DEF058134914.
Tristan und Isolde, Act II: Isolde! Geliebte! - Tristan! Geliebter!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0277069833db489b81dd0453b87e60e207f8809eaec77f2f36703cbdd9d031. 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/DEF058134915.
Tristan und Isolde, Act II: O sink hernieder, Nacht der Liebe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb3cd270cf596073af1e7cd59fa58baeab9fd5b97955f10c21428188f9955e. 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/DEF058134904.
Tristan und Isolde, Act II: Einsam wachend in der Nacht
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Tristan und Isolde, Act II: Lausch, Geliebter!
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Tristan und Isolde, Act II: Doch unsre Liebe, heißt sie nicht Tristan und Isolde?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c5c406cf105ed553fad53980f534e335ca537365d35ba62fbb122ce51f901. 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/DEF058134918.
Tristan und Isolde, Act II: Rette dich, Tristan!
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Tristan und Isolde, Act II: Tatest du's wirklich?
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Tristan und Isolde, Act II: O König, das kann ich dir nicht sagen
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e2ffd023a72814401622641bddbb51322bb9de5061f1fee489b59058aab2f. 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/DEF058134905.
Tristan und Isolde, Act III: Man hört einen Hirtenreigen
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Tristan und Isolde, Act III: Kurwenal! He!
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Tristan und Isolde, Act III: Hei nun! Wie du kamst?
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Tristan und Isolde, Act III: Noch losch das Licht nicht aus
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Tristan und Isolde, Act III: Noch ist kein Schiff zu sehn!
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Tristan und Isolde, Act III: Bist du nun tot? O Wonne! Freude!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892cf12aea33b0d71a00ccca73a13be221403c143c1f430f89fb0b49e9c9135. 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/DEF058134906.
Tristan und Isolde, Act III: O diese Sonne!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9724031cfe105c6ba95a1e4dcc0934fee5bd900ce9bbb16763d7c5ca4d009309. 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/DEF058134928.
Tristan und Isolde, Act III: Ich bin's, ich bin's
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Tristan und Isolde, Act III: Kurwenal! Hör!
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Tristan und Isolde, Act III: Mild und leise wie er lächelt
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Beethoven, Brahms & Others: Orchestral Works
Fortuna imperatrix mundi: Fortuna (Chorus)
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Schubert: Die Freunde von Salamanka, D. 326, Act II: No. 12, Duo. Gelagert unterm hellen Dach der Bäume
Mozart: Complete Edition Vol.11: Vespers, Oratorios etc
Bach: Easter Cantatas BWV 4, 31, 66, 134