Kurt Widmer
type: MusicGroup
description: Kurt Widmer (28 December 1940 – 31 May 2023) was a Swiss baritone and voice teacher, who appeared and recorded internationally. He focused on concert singing, especially of oratorios from the Romantic
popularity: 10
followers: 53
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  date published: 1969-01-01
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      date published: 1969-01-01
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      date published: 2026-07-31T08:26:41Z
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  track: Requiem: Sequentia - Dies Irae - Tuba Mirum - Mors Stupebit - Judex Ergo - Rex Tremendae
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  track: Requiem: Sanctus
track: Oratorio de Noel, Op. 12: Tollite hostias (Chorus)
track: Oratorio de Noel, Op. 12: Prelude (In the Style of Seb. Bach)
track: Oratorio de Noel, Op. 12: Duet: Benedictus qui venit (Soprano, Basso)
track: Oratorio de Noel, Op. 12: Recitative and Chorus: Et Pastores erant - Gloria (Chorus)
track: Oratorio de Noel, Op. 12: Quare fremuerunt gentes (Chorus)
track: Oratorio de Noel, Op. 12: Air: Expectants expectavi Dominum (Soprano)
track: Oratorio de Noel, Op. 12: Air: Domine, ego credidi (Tenor, Chorus)
track: Oratorio de Noel, Op. 12: Trio: Tecum principium (Soprano, Tenor, Basso)
track: Oratorio de Noel, Op. 12: Quartet: Alleluja (Soprano, Soprano, Alto, Basso)
track: Oratorio de Noel, Op. 12: Quintet and Chorus: Consurge, Filia Sion (Soprano, Soprano, Alto, Basso, Chorus)

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Requiem: Sanctus
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by artist: Montreux Festival Chorus
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  date published: 1969-01-01
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genre: classical
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  date published: 2026-07-31T13:50:38Z
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Oratorio de Noel, Op. 12: Tollite hostias (Chorus)
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subject of: OpenTimestamps Proof of Existence
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Oratorio de Noel, Op. 12: Prelude (In the Style of Seb. Bach)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Oratorio de Noel, Op. 12: Duet: Benedictus qui venit (Soprano, Basso)
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by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 5
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502305
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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  value: 2026-07-07T00:41:15+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502305
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 0x7fdfed2f104715fb619b32a39796ad00495a800676e7987b93ee61a3ee8564da. 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/DEAD60502305 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Oratorio de Noel, Op. 12: Duet: Benedictus qui venit (Soprano, Basso)
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Oratorio de Noel, Op. 12: Recitative and Chorus: Et Pastores erant - Gloria (Chorus)
type: MusicRecording
duration: PT5M47S
duration ms: 347733
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 4
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502302
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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  value: 2026-07-30T19:16:09+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960300
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502302
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T19:42:40Z
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 0xf3b4952836c41f12b7a761103bda6686d620479694bfe606853ebabe888c98b4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEAD60502302 — a six-check JSON result.
  date published: 2026-07-30T19:42:40Z
audio: Oratorio de Noel, Op. 12: Recitative and Chorus: Et Pastores erant - Gloria (Chorus)
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  additional property: Danceability
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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)
    type: PropertyValue
    value: -27.109
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Oratorio de Noel, Op. 12: Quare fremuerunt gentes (Chorus)
type: MusicRecording
duration: PT3M59S
duration ms: 239933
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 4
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502306
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T01:00:00+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960183
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502306
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T01:10:20Z
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 0xa57dc6c3b5e8c5636de0b8675dca2c7f32c913fa7ce405fce744af621c3ef52e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502306 — a six-check JSON result.
  date published: 2026-07-30T01:10:20Z
audio: Oratorio de Noel, Op. 12: Quare fremuerunt gentes (Chorus)
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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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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    value: -24.742
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
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Oratorio de Noel, Op. 12: Air: Expectants expectavi Dominum (Soprano)
type: MusicRecording
duration: PT4M8S
duration ms: 248466
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 3
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502303
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T10:26:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd9011c0134a9ebc65f0e0cb958ee2dbf1a6b4b83f8add04a1a4c3d4fb273295f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502303
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
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 0xd9011c0134a9ebc65f0e0cb958ee2dbf1a6b4b83f8add04a1a4c3d4fb273295f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAD60502303 — a six-check JSON result.
  date published: 2026-07-31T12:24:41Z
audio: Oratorio de Noel, Op. 12: Air: Expectants expectavi Dominum (Soprano)
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  additional property: Danceability
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Mode Name
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Oratorio de Noel, Op. 12: Air: Domine, ego credidi (Tenor, Chorus)
type: MusicRecording
duration: PT4M1S
duration ms: 241760
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 3
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502304
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T00:41:30+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960334
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502304
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T02:19:15Z
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 0xcf3a3f2f4693e1874a511dc0f9b3fef3217e0bd2ae36f5d18d39da94dbbc556c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAD60502304 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
audio: Oratorio de Noel, Op. 12: Air: Domine, ego credidi (Tenor, Chorus)
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  additional property: Acousticness
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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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    value: -27.197
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Oratorio de Noel, Op. 12: Trio: Tecum principium (Soprano, Tenor, Basso)
type: MusicRecording
duration: PT4M23S
duration ms: 263933
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
  date published: 2005-01-01
popularity: 3
genre: classical
genre: late-romantic-era
genre: french-romanticism
isrc code: DEAD60502307
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T05:14:10+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960349
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502307
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T05:23:41Z
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 0x87dcf210dba839ac413823ac91c9bc6777e5e49d83fd364613449177af66cbb0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEAD60502307 — a six-check JSON result.
  date published: 2026-07-31T05:23:41Z
audio: Oratorio de Noel, Op. 12: Trio: Tecum principium (Soprano, Tenor, Basso)
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Oratorio de Noel, Op. 12: Quartet: Alleluja (Soprano, Soprano, Alto, Basso)
type: MusicRecording
duration: PT2M14S
duration ms: 134600
explicit: false
by artist: Camille Saint-Saëns
by artist: Verena Schweizer
by artist: Edith Wiens
by artist: Helena Jungwirth
by artist: Friedreich Melzer
by artist: Kurt Widmer
by artist: Hans-Joachim Bartsch
by artist: Barbara Biermann
by artist: Mainz Bach Choir
by artist: Mainz Bach Orchestra
by artist: Diethard Hellmann
in album: Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
  type: MusicAlbum
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audio: Oratorio de Noel, Op. 12: Quartet: Alleluja (Soprano, Soprano, Alto, Basso)
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Oratorio de Noel, Op. 12: Quintet and Chorus: Consurge, Filia Sion (Soprano, Soprano, Alto, Basso, Chorus)
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by artist: Mainz Bach Choir
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