Christian Boesch (born 27 July 1941) is an Austrian operatic baritone. He is the son of the soprano Ruthilde Boesch, and studied at the University of Music and Performing Arts Vienna, from 1959 to 196
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 0xda0543b8e6c8302283f7084c2f00cb1791666f829e939b76c21f61d660d7018b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/054662ad-7e1e-4a07-b4f3-3aaf2a449a02.json and https://artists.proofprofile.net/proofs/artist/054662ad-7e1e-4a07-b4f3-3aaf2a449a02.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mozart - The 50 Best Classical Masterpieces
Le nozze di Figaro, K. 492: No. 21 Duettino: "Sull'aria?..Che soave zeffiretto"
Orchestra del Maggio Musicale Fiorentino
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 0x6a1b67e852e4d203fa0c4e60d85f009e129c428026ca80c05195180e0dbb3cb9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10102306 — a six-check JSON result.
Mozart in the Jungle, Season 3 (An Amazon Original Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372965d5bcec1672f62e4aca606e47438f48fade14bc6037e51f72ccb0217483. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190554501 — a six-check JSON result.
Die Zauberflöte, K. 620: Pa-Pa-Pa-Papagena!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca728117bdc287d24144b4c9612a9b39b7c1e8d9cc6e3561b5355e28c502663. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC18000225 — a six-check JSON result.
Slavonic Dances, Op. 72, B. 147: No. 2, Dumka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022aec7cec0a4689f55ebea080bed4f8687d52b2d51a158eda261b86170bb38e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM16200897 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31167261809560d10062fea44b6dcf763f85c2cf8c898708ca1e56e38bcdf0d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600027 — a six-check JSON result.
Don Giovanni, K.527: "Là ci darem la mano"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ffedec2a37f4991817323eecf53016d0c55ac01a5499ec3a3d6f49cd34094. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600028 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eeff2e3d8e668a46e6f00f3363fb82946a51eeb58901e12593c05c301eb45b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600029 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296a9c2e1cc60b8d9fd8f09f8360c8b1ff4aea11c4713158b997c015c3c62fa. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11609420 — a six-check JSON result.
Oboe Concerto in C Major, K. 314/285d: I. Allegro aperto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fb59734ff29b1ca6c2424908bb7d9089ead4eb796a61e0ad6b83f79e68c6ae. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10302462 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a52965ae160b804326927946dc54fade9f81fb4c80735f42e217b0ee35ba792. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd24591e166856bc10ff11a29f2d5e4c3a754d50a0d420ea5602bc11871f98. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600031 — a six-check JSON result.
Symphony No. 5 in E-Flat Major, Op. 82: III. Allegro molto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2305f43c030e032aeadf713bde624a5a4e1480fc6069a962b019066b8586cfe1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ57D1600032 — a six-check JSON result.
Je n'aime pas Mozart, mais ça j'aime bien !
Symphony No. 40 in G Minor, K. 550: I. Molto allegro
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Requiem in D Minor, K. 626: III. Sequentia: Lacrimosa
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Piano Sonata No. 11 in A Major, KV 311: III. Alla Turca. Allegretto
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Piano Concerto No. 9 in E-Flat Major, K. 271 "Jeunehomme": III. Rondo. Presto
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Great Mass in C Minor, K. 427 (417a): I. Kyrie - Andante Moderato
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Piano Concerto No. 23 in A Major, K. 488: II. Adagio
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c97b2d7ed0565afba64deaa535758e06926cc100902b61afd9314c806a6bec. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051500724 — a six-check JSON result.
Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed0831165c3bb9371e37949e3aa2f245db9cc2c8ba8adc9cf9886b1619ad6e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC10400671 — a six-check JSON result.
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": I. Allegro
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Die Zauberflöte, K. 620: Der Hölle Rache
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dbfb619a751c2c0c0852d787a4ab56f8d4d2b9c7bdff44b6f3b9139ed7126. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10006732 — a six-check JSON result.
Symphony No. 25 in G Minor, K. 183: I. Allegro con brio
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Ruthilde Boesch - Echo eines Sängerlebens
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc3773312b28423daf65bd626f778c4f27367d631caba893e493f958ff83fd5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC16700176 — a six-check JSON result.
The 50 Absolute Essentials of Classical Music
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La traviata: Act I: Libiamo ne' lieti calici (Brindisi)
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Baritone and Bass Arias: The Definitive Collection
Die Entführung aus dem Serail, K. 384: O, wie will ich triumphieren
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Macbeth: Studia il passo... Come dal ciel precipita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24344264c3939f77d1fc00fc082235d37981064c60f328b4e940171dfd3336ef. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC15900319 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd103d620b0481c61ecd2e8a1c289a9b171e538224c7949e85806587c9226084. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10901310 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2053d2922900808ce82bdc736b051f91fb10bfb720cd22574ced91312a7009. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19606097 — a six-check JSON result.
Il barbiere di Siviglia: La calunnia è un venticello
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae1d19ab30ccd36a32d1bb10e4a276fbe456155c7ec177da3dd1d8eaca3fd3b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11201709 — a six-check JSON result.
Don Giovanni, K. 527: Madamina, il catalogo è questo
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Le nozze di Figaro, K. 492: Non più andrai
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7aa4ee7ced9ce03fe3eebfeacb834b55fd37261405dd8fafa450935b0bbcc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10104754 — a six-check JSON result.
Mozart: Die Zauberflöte - The Sony Opera House
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Die Zauberflöte, K. 620: Der Vogelfänger Bin Ich Ja (Song)
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Die Zauberflöte, K. 620: March of the Priests
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Mozart: Die Zauberflöte K620 (Highlights) - Sony Classical Masters
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"Un bel dì, vedremo" from Madama Butterfly
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Faszination Klang - Die Wiener Philharmoniker
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