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description: Wolfgang Boettcher (30 January 1935 – 24 February 2021) was a German classical cellist and academic teacher. He was principal cellist of the Berlin Philharmonic, and a founding member of The 12 Cellis
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track: Offenbach: La Grande-Duchesse de Gérolstein, Act 1: Overture
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  by artist: Jacques Offenbach
  by artist: Felicity Lott
  by artist: Sandrine Piau
  by artist: Yann Beuron
  by artist: Choeur des Musiciens du Louvre
  by artist: Les Musiciens du Louvre
  by artist: Grenoble
  by artist: Marc Minkowski
  by artist: Les Musiciens du Louvre.Grenoble
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    type: MusicAlbum
    date published: 2019-04-26
  genre: classical
  genre: german-romanticism
  genre: late-romantic-era
  genre: french-opera
  genre: french-romanticism
  genre: operetta
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  additional property: OTSVerifyInstructions
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    value: 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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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track: Offenbach: Les Brigands: Ouverture
  type: MusicRecording
  duration: PT3M18S
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  by artist: John Eliot Gardiner
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  genre: french-romanticism
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  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Offenbach: Les Brigands: Ouverture
track: Offenbach: La Vie parisienne, Act 1: "Je suis brésilien et j'ai de l'or" (Le Brésilien)

Orchestre de l'Opéra de Lyon
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Festival Offenbach
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
type: PropertyValue
value: 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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b317d0b915e6e9790e4bd9993c743e031f639800a1fca222371feae53be7d4a. 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/FRZ118802739 — a six-check JSON result.
date published: 2026-07-02T03:55:08Z

Offenbach: Les Brigands: Ouverture
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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Offenbach: La Vie parisienne, Act 1: "Je suis brésilien et j'ai de l'or" (Le Brésilien)
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duration: PT1M56S
duration ms: 116973
explicit: false
by artist: Jacques Offenbach
by artist: Michel Plasson
by artist: Jean Christophe Benoit
by artist: Orchestre Du Capitole De Toulouse
in album: Festival Offenbach
  type: MusicAlbum
  date published: 2019-04-26
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
isrc code: FRZ117605401
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-30T18:23:33Z
audio: Offenbach: La Vie parisienne, Act 1: "Je suis brésilien et j'ai de l'or" (Le Brésilien)
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  additional property: Danceability
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Weber, C.M. Von: Bassoon Concerto, Op. 75 / Andante E Rondo Ungarese / Brahms, J.: Double Concerto, Op. 102
type: MusicAlbum
date published: 1993-01-01
track: Bassoon Concerto in F Major, Op. 75, J. 127: I. Allegro ma non troppo
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  by artist: Carl Maria von Weber
  by artist: Milan Turkovic
  by artist: Stuttgart Radio Symphony Orchestra
  by artist: Sir Neville Marriner
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    type: MusicAlbum
    date published: 1993-01-01
  genre: classical
  genre: opera
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSBitcoinBlock
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c1ffaf19d2cc540d0156e8979525548ca7e695fff41556a5becdddebfd883. 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/US2TL0909201 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Bassoon Concerto in F Major, Op. 75, J. 127: I. Allegro ma non troppo
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Valence (Positivity)
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    additional property: Key Name
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track: Bassoon Concerto in F Major, Op. 75, J. 127: II. Adagio
  type: MusicRecording
  duration: PT4M33S
  duration ms: 273626
  explicit: false
  by artist: Carl Maria von Weber
  by artist: Milan Turkovic
  by artist: Stuttgart Radio Symphony Orchestra
  by artist: Sir Neville Marriner
  in album: Weber, C.M. Von: Bassoon Concerto, Op. 75 / Andante E Rondo Ungarese / Brahms, J.: Double Concerto, Op. 102
    type: MusicAlbum
    date published: 1993-01-01
  genre: classical
  genre: opera
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc869f7c311c799e65e95c5f6823a4b355acfbcd34b0ce36715f57ab9484cbdf2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0909202 — a six-check JSON result.
    date published: 2026-07-07T14:41:13Z
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track: Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo. Allegro
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  by artist: Carl Maria von Weber
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  by artist: Stuttgart Radio Symphony Orchestra
  by artist: Sir Neville Marriner
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    date published: 1993-01-01
  genre: classical
  genre: opera
  isrc code: US2TL0909203
  additional property: CopyrightID
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  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo. Allegro
track: Andante -
track: Andante e Rondo ungarese in C Minor, Op. 35, J. 158: Rondo. Adagio

CopyrightRegisteredAt
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CopyrightChainExplorerURL
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OTSHash
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OTSBitcoinBlock
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value: 960494

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960494

OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0909203

OTSTimestamp
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OTSVerifyInstructions
type: PropertyValue
value: 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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fa65497f19d2786db5206c2906d6a33e1cb31e8c3835e41d08883b2d082534. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0909203 — a six-check JSON result.
date published: 2026-08-01T01:44:32Z

Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo. Allegro
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additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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Andante -
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Andante e Rondo ungarese in C Minor, Op. 35, J. 158: Rondo. Adagio
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Plaisir d'amour: Souvenirs de la Belle Epoque
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track: Godard: Jocelyn, Op. 100, Act 1: Berceuse. "Oh ! Ne t'éveille pas encore" (Instrumental Version)
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Wie einst in schöner'n Tagen - Salonmusik der Belle Epoque
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date published: 1976

Classical Serenades
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Klingende Kostbarkeiten von Conradin Kreutzer und Franz Schubert
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