Hilmar Alexandersen
type: MusicGroup
genre: hardingfele
popularity: 3
followers: 198
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd648162681215e1d7091c7b828e0c9947767ad6dede9bcc6d5ba48bbe8933d33
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954618
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954618
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c94d25a4-2fe9-49f9-898b-c6bdd463c4bc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c94d25a4-2fe9-49f9-898b-c6bdd463c4bc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c94d25a4-2fe9-49f9-898b-c6bdd463c4bc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:05:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd648162681215e1d7091c7b828e0c9947767ad6dede9bcc6d5ba48bbe8933d33","name":"Hilmar Alexandersen","registered_at":"2026-06-20T22:08:27Z","symbol":"NIM1730036","token_address":"0x04c4a5e052ee347fe095ecc9863ce58e81ac24e7","type":"artist","uuid":"c94d25a4-2fe9-49f9-898b-c6bdd463c4bc"}
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 0xd648162681215e1d7091c7b828e0c9947767ad6dede9bcc6d5ba48bbe8933d33. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c94d25a4-2fe9-49f9-898b-c6bdd463c4bc.json and https://artists.proofprofile.net/proofs/artist/c94d25a4-2fe9-49f9-898b-c6bdd463c4bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:05:13Z
  text: {"copyright_id":"0xd648162681215e1d7091c7b828e0c9947767ad6dede9bcc6d5ba48bbe8933d33","name":"Hilmar Alexandersen","registered_at":"2026-06-20T22:08:27Z","symbol":"NIM1730036","token_address":"0x04c4a5e052ee347fe095ecc9863ce58e81ac24e7","type":"artist","uuid":"c94d25a4-2fe9-49f9-898b-c6bdd463c4bc"}
album: n'Hilmar
  type: MusicAlbum
  date published: 2022-11-11
album: Søng dæ glad
  type: MusicAlbum
  date published: 1980-01-01
album: Folkemusikk Fra Trøndelag
  type: MusicAlbum
  date published: 1995
  track: Siste Leken Som Sulhusgubben Spelte
    type: MusicRecording
    duration: PT1M50S
    duration ms: 110693
    explicit: false
    by artist: Åshild Breie Nyhus
    by artist: Sven Nyhus
    by artist: Peder Nyhus
    in album: Folkemusikk Fra Trøndelag
      type: MusicAlbum
      date published: 1995
    popularity: 1
    isrc code: NOFGG4069180
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T20:36:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9db8b13267cca8c2d88d783d0a3217f769035ba888b2e55c6d2b833d7209da56
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957120
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957120
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFGG4069180
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-08T03:22:41Z
    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 0x9db8b13267cca8c2d88d783d0a3217f769035ba888b2e55c6d2b833d7209da56. 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/NOFGG4069180.
      date published: 2026-07-08T03:22:41Z
    audio: Siste Leken Som Sulhusgubben Spelte
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 137.504
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.246
      additional property: Energy
        type: PropertyValue
        value: 0.317
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.982
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.87
      additional property: Liveness
        type: PropertyValue
        value: 0.642
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.29
      additional property: Loudness (dB)
        type: PropertyValue
        value: -16.484
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Fant-Karl / Spelemannsarven
  type: MusicAlbum
  date published: 2009-03-09
album: Fanitullen 1
  type: MusicAlbum
  date published: 1999-08-03
album: Slåttar frå Trøndelag og Rørostraktene
  type: MusicAlbum
  date published: 2008