Kirsti Sparboe
type: MusicGroup
description: thumb|Kirsti Sparboe in 1967 thumb|right|220px|Kirsti Sparboe at the 1965 Eurovision Kirsti Sparboe (born 7 December 1946) is a Norwegian musical performer and an actress. Most of her musical career
popularity: 3
followers: 3
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
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/98b424aa-0e3b-431d-8159-15161251885f.ots
additional property: OTSRecordURL
  type: PropertyValue
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7693d9cd73d76ddb1dc8f959c66344d051582724fe8d3fd9234a3c9cdd8debf1. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98b424aa-0e3b-431d-8159-15161251885f.json and https://artists.proofprofile.net/proofs/artist/98b424aa-0e3b-431d-8159-15161251885f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0x7693d9cd73d76ddb1dc8f959c66344d051582724fe8d3fd9234a3c9cdd8debf1","name":"Kirsti Sparboe","registered_at":"2026-06-17T18:58:58Z","symbol":"NIM1488709","token_address":"0xf70666a599e8b6fb206184c8c74dda9a384242e5","type":"artist","uuid":"98b424aa-0e3b-431d-8159-15161251885f"}
track: Nordlandsnetter
  type: MusicRecording
  duration: PT3M29S
  duration ms: 209693
  explicit: false
  by artist: Kirsti Sparboe
  in album: Et Vennlig Ord
    type: MusicAlbum
    date published: 2007-10-01
  isrc code: NOCTB0702020
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
    type: PropertyValue
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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 0x9c91d1ba301c86e1239e4ddd7f49a47e0b53775770e843354aefc990c8bd8310. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOCTB0702020.
    date published: 2026-07-02T03:30:09Z
  audio: Nordlandsnetter
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 180.96
    additional property: Musical Key
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      value: 5
    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
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      value: 5
    additional property: Danceability
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    additional property: Energy
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      value: 0.234
    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
      type: PropertyValue
      value: 0.098
    additional property: Valence (Positivity)
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      value: 0.275
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.387
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major