Ernestine Schumann-Heink
type: MusicGroup
description: Ernestine Schumann-Heink (15 June 186117 November 1936) was a Bohemian-born Austrian-American operatic dramatic contralto of German Bohemian descent. She was noted for the flexibility and wide range o
popularity: 2
followers: 421
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-21T07:29:20Z
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album: Stille Nacht, Heilige Nacht
  type: MusicAlbum
  date published: 1912
album: Trees
  type: MusicAlbum
  date published: 1926
album: Ernestine Schumann-Heink (Recorded 1906 - 1929)
  type: MusicAlbum
  date published: 1990-01-01
album: Prima Voce: Ernestine Schumann-Heink
  type: MusicAlbum
  date published: 1996
album: Opera Arias (Contralto): Schumann-Heink, Ernestine - Mehrkens, A. / Arditi, L. / Schubert, F. / Wagner, R. / Meyerbeer, G. (1900-1935)
  type: MusicAlbum
  date published: 1998-01-01
  track: Danny Boy
  track: Old Black Joe (Poor Old Joe)
album: Meyerbeer & Mahler & Händel & Saint-Saëns: Great Voices of the Century - Mezzo-Sopranos & Contraltos Vol. 1
  type: MusicAlbum
  date published: 2004-01-01
album: Schumann-Heink: Le prophete: Il va venir
  type: MusicAlbum
  date published: 2022-06-22

Danny Boy
type: MusicRecording
duration: PT3M31S
duration ms: 211533
explicit: false
by artist: Ernestine Schumann-Heink
in album: Opera Arias (Contralto): Schumann-Heink, Ernestine - Mehrkens, A. / Arditi, L. / Schubert, F. / Wagner, R. / Meyerbeer, G. (1900-1935)
  type: MusicAlbum
  date published: 1998-01-01
isrc code: USASX0855339
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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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89864cf96e309ca1f03a4bd1a17c3570fc7c0d99adff55b5d48327004944f5ef. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0855339.
  date published: 2026-07-08T03:22:41Z
audio: Danny Boy
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  additional property: Time Signature
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    value: 5
  additional property: Danceability
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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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Old Black Joe (Poor Old Joe)
type: MusicRecording
duration: PT3M48S
duration ms: 228533
explicit: false
by artist: Ernestine Schumann-Heink
in album: Opera Arias (Contralto): Schumann-Heink, Ernestine - Mehrkens, A. / Arditi, L. / Schubert, F. / Wagner, R. / Meyerbeer, G. (1900-1935)
  type: MusicAlbum
  date published: 1998-01-01
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9d379d8896c107466db007dc3bf644f1046c974a863a21081f58c1a471b26. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USASX0855329.
  date published: 2026-07-29T12:35:17Z
audio: Old Black Joe (Poor Old Joe)
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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: Valence (Positivity)
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    value: 0.199
  additional property: Loudness (dB)
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    value: -28.431
  additional property: Key Name
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    value: C
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    value: Major
isrc code: USASX0855329
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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