Knut Halvards
type: MusicGroup
genre: polka
popularity: 8
followers: 337
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2bf1acf626c6ebec443d588cfffa517a32f7a080a5368f5a797c4e01f6ffc75e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81882692-4678-40bd-a7ed-1db418e4d8b2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/81882692-4678-40bd-a7ed-1db418e4d8b2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/81882692-4678-40bd-a7ed-1db418e4d8b2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2bf1acf626c6ebec443d588cfffa517a32f7a080a5368f5a797c4e01f6ffc75e","name":"Knut Halvards","registered_at":"2026-06-17T10:49:36Z","symbol":"NIM1372009","token_address":"0x245fdc0ced7f009955f1aa5cdce5ba34667d5bd0","type":"artist","uuid":"81882692-4678-40bd-a7ed-1db418e4d8b2"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf1acf626c6ebec443d588cfffa517a32f7a080a5368f5a797c4e01f6ffc75e. 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/81882692-4678-40bd-a7ed-1db418e4d8b2.json and https://artists.proofprofile.net/proofs/artist/81882692-4678-40bd-a7ed-1db418e4d8b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x2bf1acf626c6ebec443d588cfffa517a32f7a080a5368f5a797c4e01f6ffc75e","name":"Knut Halvards","registered_at":"2026-06-17T10:49:36Z","symbol":"NIM1372009","token_address":"0x245fdc0ced7f009955f1aa5cdce5ba34667d5bd0","type":"artist","uuid":"81882692-4678-40bd-a7ed-1db418e4d8b2"}
album: Stakkars Per
  type: MusicAlbum
  date published: 1982-01-06
album: Stakkars Per
  type: MusicAlbum
  date published: 1982-01-06
album: Stakkars Per
  type: MusicAlbum
  date published: 1982-01-06
album: Slåttefest
  type: MusicAlbum
  date published: 1986-06-15
album: Slåttefest
  type: MusicAlbum
  date published: 1986-06-15
album: Slåttefest
  type: MusicAlbum
  date published: 1986-06-15
album: Gamla Kom Inn Att
  type: MusicAlbum
  date published: 2009-01-28
album: Gamla Kom inn Att
  type: MusicAlbum
  date published: 2009-01-28
  track: Gamla Kom inn Att, Reinlender
    type: MusicRecording
    duration: PT2M37S
    duration ms: 157346
    explicit: false
    by artist: Knut Halvards
    in album: Gamla Kom inn Att
      type: MusicAlbum
      date published: 2009-01-28
    genre: polka
    isrc code: NOFCA8201080
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T10:26:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd27f1796d08ce2383f516340ff560651a08cd7839775efc5b772c7278d5aa37a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFCA8201080
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27f1796d08ce2383f516340ff560651a08cd7839775efc5b772c7278d5aa37a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NOFCA8201080.
      date published: 2026-07-03T19:59:51Z
    audio: Gamla Kom inn Att, Reinlender
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 163.992
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.435
      additional property: Energy
        type: PropertyValue
        value: 0.478
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.061
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.001
      additional property: Liveness
        type: PropertyValue
        value: 0.156
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.969
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.558
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Gamla Kom Inn Att
  type: MusicAlbum
  date published: 2009-01-28