Ernst Rolf
type: MusicGroup
genre: swedish ballads
description: Ernst Ragnar Johansson (20 January 1891– 25 December 1932), professionally known as Ernst Rolf was a Swedish actor, singer and composer and musical revue artist.Ernst Rolf. sv.wikipedia.org. Retrieve
popularity: 12
followers: 1182
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c7b0a2aa-8469-45b0-adae-6bb4d7ba5cc5.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/c7b0a2aa-8469-45b0-adae-6bb4d7ba5cc5.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a56ad0775d3f0bef13c4301ffda70277eb513e4f4ee7f77eb6a4f46908b189c. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7b0a2aa-8469-45b0-adae-6bb4d7ba5cc5.json and https://artists.proofprofile.net/proofs/artist/c7b0a2aa-8469-45b0-adae-6bb4d7ba5cc5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T10:33:29Z
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album: Bland Bränningar Och Skär
  type: MusicAlbum
  date published: 1924
album: Ernst Rolf: Det bästa jag har – 20 Original Recordings (Recorded 1931)
  type: MusicAlbum
  date published: 2000-01-01
album: Det bästa jag har - 20 originalinspelningar från 1931
  type: MusicAlbum
  date published: 2004-03-15
album: Svenska sångfavoriter
  type: MusicAlbum
  date published: 2005-01-14
  track: Dansen går på Svinsta kär
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187480
    explicit: false
    by artist: Ernst Rolf
    in album: Svenska sångfavoriter
      type: MusicAlbum
      date published: 2005-01-14
    genre: swedish ballads
    isrc code: SEAMA2821100
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    additional property: OTSBitcoinBlockVerifyURL
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      value: https://blockstream.info/api/block-height/958639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAMA2821100
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T01:18:30Z
    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 0x98405896728a1d9889aa5bbc0e0babbb9ec886a0619f78dcfec8dedf3f478d3a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SEAMA2821100.
      date published: 2026-07-19T01:18:30Z
    audio: Dansen går på Svinsta kär
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 190.1
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.506
      additional property: Energy
        type: PropertyValue
        value: 0.399
      additional property: Speechiness
        type: PropertyValue
        value: 0.077
      additional property: Acousticness
        type: PropertyValue
        value: 0.984
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.313
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.572
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.179
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Ernst Rolfs Norske Innspillinger
  type: MusicAlbum
  date published: 2011-03-01
album: Ernst Rolfs norske innspillinger
  type: MusicAlbum
  date published: 2011-03-08
album: Ernst Rolf: Etthundra år
  type: MusicAlbum
  date published: 2011-05-03
album: Ernst Rolf: Etthundra år
  type: MusicAlbum
  date published: 2011-05-03
album: Ernst Rolf sjunger Jules Sylvain
  type: MusicAlbum
  date published: 2023-05-19