Katalin Károlyi
type: MusicGroup
genre: minimalism
description: alt=|thumb|Sunday, May 27, 2018, at the Esperanza Iris City Theater. Katalin Károlyi is a Hungarian mezzo-soprano, noted for singing in Baroque opera, particularly those directed by William Christie.
popularity: 10
followers: 71
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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: OTSVerifyInstructions
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  value: 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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-19T03:22:39Z
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album: Gerald Barry: The Importance of Being Earnest (Live)
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  date published: 2014-11-04
album: Hungarian Songs: Bartók, Kodály & Ligeti
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  date published: 2023-06-30
  track: Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: II. Istenem, istenem
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    by artist: Béla Bartók
    by artist: Katalin Károlyi
    by artist: Klára Würtz
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      date published: 2023-06-30
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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
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      date published: 2026-07-31T13:04:34Z
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  track: Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: III. Asszonyok, asszonyok
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    by artist: Katalin Károlyi
    by artist: Klára Würtz
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      date published: 2023-06-30
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    additional property: OTSTimestamp
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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
      type: DigitalDocument
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      date published: 2026-07-08T03:20:19Z
    audio: Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: III. Asszonyok, asszonyok
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  track: Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: IV. Annyi bánat az szűvemen
album: Cage: Works for Percussion, Vol. 2 (1941-1950)
album: Nathan Davis: Hagoromo (Live)
album: Boulez: Le marteau sans maître, Éclat & Dialogue de l'ombre double
album: Peri: Euridice (Live)
album: Vivaldi: La Seine En Fête
album: Gerald Barry: The Importance of Being Earnest (Live at the Barbican Hall, London, 4/26/2012)

Liveness
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Loudness (dB)
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Mode Name
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Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: IV. Annyi bánat az szűvemen
type: MusicRecording
duration: PT1M8S
duration ms: 68413
explicit: false
by artist: Béla Bartók
by artist: Katalin Károlyi
by artist: Klára Würtz
in album: Hungarian Songs: Bartók, Kodály & Ligeti
  type: MusicAlbum
  date published: 2023-06-30
isrc code: NLY332301198
additional property: CopyrightID
additional property: CopyrightStatus
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc950d6bdf440d205e912e2fd849cb22c5923e8ea8c1122d7530b77df2482e38d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332301198.
  date published: 2026-07-31T12:24:41Z
audio: Nyolc magyar népdal BB 47, 8 Hungarian Folk Songs: IV. Annyi bánat az szűvemen
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Cage: Works for Percussion, Vol. 2 (1941-1950)
type: MusicAlbum
date published: 2014-11-01

Nathan Davis: Hagoromo (Live)
type: MusicAlbum
date published: 2018-11-16

Boulez: Le marteau sans maître, Éclat & Dialogue de l'ombre double
type: MusicAlbum
date published: 2017-03-17

Peri: Euridice (Live)
type: MusicAlbum
date published: 2017-01-20
track: Euridice: Prologue: Io, che d'alti sospir vaga e di pianti (La Tragedia)
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  by artist: Jacopo Peri
  by artist: Françoise Masset
  by artist: Les Arts Baroques
  by artist: Mireille Podeur
  in album: Peri: Euridice (Live)
    type: MusicAlbum
    date published: 2017-01-20
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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    value: 2026-07-31T00:26:26Z
  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
    type: DigitalDocument
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    date published: 2026-07-31T00:26:26Z
  audio: Euridice: Prologue: Io, che d'alti sospir vaga e di pianti (La Tragedia)
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track: Euridice, Act I: Scene 2: Nel pur ardor de la più bella stella (Tirsi)
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  by artist: Jacopo Peri
  by artist: Bruno Karl Boës
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  by artist: Mireille Podeur
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    date published: 2017-01-20
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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 0x7ffb167e78e49df0977229a847c378c2d8f2a7c4532ae0123a42694cf9435759. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRW030810174.
    date published: 2026-07-31T17:29:52Z
  audio: Euridice, Act I: Scene 2: Nel pur ardor de la più bella stella (Tirsi)
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track: Euridice, Act I: Scene 2: Per quel vago boschetto (Dafne)
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    date published: 2017-01-20
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  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Euridice, Act I: Scene 2: Per quel vago boschetto (Dafne)

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 960368

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960368

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRW030810176

OTSTimestamp
type: PropertyValue
value: 2026-07-31T08:26:41Z

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 0x7f5706a345e52d2e4397f423ecb1837e525b96964edc7e656a8185d089caec8b. 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/FRW030810176.
date published: 2026-07-31T08:26:41Z

Euridice, Act I: Scene 2: Per quel vago boschetto (Dafne)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 131.216
additional property: Musical Key
  type: PropertyValue
  value: 5
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 6
additional property: Danceability
  type: PropertyValue
  value: 0.355
additional property: Energy
  type: PropertyValue
  value: 0.061
additional property: Speechiness
  type: PropertyValue
  value: 0.048
additional property: Acousticness
  type: PropertyValue
  value: 0.955
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.152
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.097
additional property: Loudness (dB)
  type: PropertyValue
  value: -24.888
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Vivaldi: La Seine En Fête
type: MusicAlbum
date published: 2003-01-01

Gerald Barry: The Importance of Being Earnest (Live at the Barbican Hall, London, 4/26/2012)
type: MusicAlbum
date published: 2014-11-04