Sigbjørn Bernhoft Osa
type: MusicGroup
genre: folk
description: Sigbjørn Bernhoft Osa (3 May 1910 – 2 February 1990) was a Norwegian fiddler and traditional folk musician. He was one of the best known Norwegian performers of folk music in the 1900s. Personal life
popularity: 4
followers: 390
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/954342
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additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ae1603f00e7d2b91c08df726f5c9da0af487ff62262044ecf890e69096e86. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a56a5d2-3729-49df-a6bd-685b74338428.json and https://artists.proofprofile.net/proofs/artist/8a56a5d2-3729-49df-a6bd-685b74338428.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
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album: Sigbjørn Bernhoft Osa
  type: MusicAlbum
  date published: 1990
  track: Fanitullen
    type: MusicRecording
    duration: PT2M26S
    duration ms: 146416
    explicit: false
    by artist: Sigbjørn Bernhoft Osa
    in album: Sigbjørn Bernhoft Osa
      type: MusicAlbum
      date published: 1990
    genre: folk
    isrc code: NOGAB5817190
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T21:15:01Z
    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 0x270925df39a26e3944363ca27d46f2c6326b0eb13e07e6cfb37ad7aecfc0c19d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOGAB5817190.
      date published: 2026-07-20T21:15:01Z
    audio: Fanitullen
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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        value: 9
      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.361
      additional property: Energy
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      additional property: Speechiness
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        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.955
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.962
      additional property: Liveness
        type: PropertyValue
        value: 0.162
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.74
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.38
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Sigbjørn Bernhoft Osa
  type: MusicAlbum
  date published: 1990
album: Virtu-Osa
  type: MusicAlbum
  date published: 2011-03-17
album: The Best of Sigbjørn Bernhoft Osa 2
  type: MusicAlbum
  date published: 2011-09-30
album: The best of Sigbjørn Bernhoft Osa 1
  type: MusicAlbum
  date published: 2011-09-30
album: The Best of Sigbjørn Bernhoft Osa 3
  type: MusicAlbum
  date published: 2011-09-30
album: The Best of Sigbjørn Bernhoft Osa 1
  type: MusicAlbum
  date published: 2011-09-30
album: The best of Sigbjørn Bernhoft Osa 4
  type: MusicAlbum
  date published: 2011-10-11
album: The Best of Sigbjørn Bernhoft Osa 4
  type: MusicAlbum
  date published: 2011-10-11