Chris Hof
type: MusicGroup
genre: nederpop
popularity: 3
followers: 204
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x27ade45cac5c3464004bf0ed896fbcb4a6a08bf22f2e9ed3b3136fa0cffa5607
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d29521d1-da7f-428f-81de-1381bf3423da.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d29521d1-da7f-428f-81de-1381bf3423da.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d29521d1-da7f-428f-81de-1381bf3423da
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x27ade45cac5c3464004bf0ed896fbcb4a6a08bf22f2e9ed3b3136fa0cffa5607","name":"Chris Hof","registered_at":"2026-06-21T01:23:35Z","symbol":"NIM1776284","token_address":"0xd61bbe44007e9b57e230c0e13ed738254858420e","type":"artist","uuid":"d29521d1-da7f-428f-81de-1381bf3423da"}
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
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ade45cac5c3464004bf0ed896fbcb4a6a08bf22f2e9ed3b3136fa0cffa5607. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d29521d1-da7f-428f-81de-1381bf3423da.json and https://artists.proofprofile.net/proofs/artist/d29521d1-da7f-428f-81de-1381bf3423da.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0x27ade45cac5c3464004bf0ed896fbcb4a6a08bf22f2e9ed3b3136fa0cffa5607","name":"Chris Hof","registered_at":"2026-06-21T01:23:35Z","symbol":"NIM1776284","token_address":"0xd61bbe44007e9b57e230c0e13ed738254858420e","type":"artist","uuid":"d29521d1-da7f-428f-81de-1381bf3423da"}
album: Dit Is Nederland
  type: MusicAlbum
  date published: 2015-03-06
  track: Dit Is Nederland
    type: MusicRecording
    duration: PT3M56S
    duration ms: 236190
    explicit: false
    by artist: Chris Hof
    in album: Dit Is Nederland
      type: MusicAlbum
      date published: 2015-03-06
    genre: nederpop
    isrc code: NLF9U1400001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T07:24:20+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9ca85221bc5c327e48d39c04bdde8c467a81ee8c36bbba25137a2bf980efa8e5
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956634
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956634
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLF9U1400001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T10:04:33Z
    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 0x9ca85221bc5c327e48d39c04bdde8c467a81ee8c36bbba25137a2bf980efa8e5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLF9U1400001 — a six-check JSON result.
      date published: 2026-07-04T10:04:33Z
    audio: Dit Is Nederland
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.018
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.633
      additional property: Energy
        type: PropertyValue
        value: 0.803
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.105
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.037
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.69
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.253
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Altijd Samen (WIJ!)
  type: MusicAlbum
  date published: 2017-07-21
album: Huis Aan De Rivier
  type: MusicAlbum
  date published: 2018-06-15
album: Veur Mekoar
  type: MusicAlbum
  date published: 2019-11-26