Lennartz (sång: Yankho Kamwendo)
type: MusicGroup
genre: dansband
popularity: 3
followers: 211
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe8df4839b39a6472557219a92a62944d77058eb1576875e848667c24afcf077e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953938
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953938
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/20ab3004-7396-4846-9931-473e881fbc5d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/20ab3004-7396-4846-9931-473e881fbc5d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/20ab3004-7396-4846-9931-473e881fbc5d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:35:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe8df4839b39a6472557219a92a62944d77058eb1576875e848667c24afcf077e","name":"Lennartz (sång: Yankho Kamwendo)","registered_at":"2026-06-16T00:58:06Z","symbol":"NIM0887237","token_address":"0x1e97e13f3d1296ec5112f825bd0ad2e4eeb9d6a3","type":"artist","uuid":"20ab3004-7396-4846-9931-473e881fbc5d"}
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 0xe8df4839b39a6472557219a92a62944d77058eb1576875e848667c24afcf077e. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20ab3004-7396-4846-9931-473e881fbc5d.json and https://artists.proofprofile.net/proofs/artist/20ab3004-7396-4846-9931-473e881fbc5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:35:56Z
  text: {"copyright_id":"0xe8df4839b39a6472557219a92a62944d77058eb1576875e848667c24afcf077e","name":"Lennartz (sång: Yankho Kamwendo)","registered_at":"2026-06-16T00:58:06Z","symbol":"NIM0887237","token_address":"0x1e97e13f3d1296ec5112f825bd0ad2e4eeb9d6a3","type":"artist","uuid":"20ab3004-7396-4846-9931-473e881fbc5d"}
track: Leende guldbruna ögon
  type: MusicRecording
  duration: PT2M33S
  duration ms: 153013
  explicit: false
  by artist: Lennartz (sång: Yankho Kamwendo)
  in album: Allsångslåtar
    type: MusicAlbum
    date published: 2008-07-14
  isrc code: SEPQA0751434
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T06:02:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xfaa119d1b12db58b602392e7e1245749db9266ec492d7a812cf96e341d329cb4
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEPQA0751434
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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 0xfaa119d1b12db58b602392e7e1245749db9266ec492d7a812cf96e341d329cb4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SEPQA0751434.
    date published: 2026-07-08T03:20:19Z
  audio: Leende guldbruna ögon
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 165.472
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.538
    additional property: Energy
      type: PropertyValue
      value: 0.808
    additional property: Speechiness
      type: PropertyValue
      value: 0.035
    additional property: Acousticness
      type: PropertyValue
      value: 0.013
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.08
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.885
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.26
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major