Leif Nahnfeldt
type: MusicGroup
popularity: 3
followers: 154
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff4b04964a1d3d28593c04ffa2153a68b6ec164f9f6d70a1170b1b70cbac7d71
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59bde7c3-c86c-48da-9e6e-40b24849cb25.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/59bde7c3-c86c-48da-9e6e-40b24849cb25.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/59bde7c3-c86c-48da-9e6e-40b24849cb25
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff4b04964a1d3d28593c04ffa2153a68b6ec164f9f6d70a1170b1b70cbac7d71","name":"Leif Nahnfeldt","registered_at":"2026-06-16T20:54:34Z","symbol":"NIM1172826","token_address":"0x64bb09210e7687b801095ef973708171cca988b8","type":"artist","uuid":"59bde7c3-c86c-48da-9e6e-40b24849cb25"}
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 0xff4b04964a1d3d28593c04ffa2153a68b6ec164f9f6d70a1170b1b70cbac7d71. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59bde7c3-c86c-48da-9e6e-40b24849cb25.json and https://artists.proofprofile.net/proofs/artist/59bde7c3-c86c-48da-9e6e-40b24849cb25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xff4b04964a1d3d28593c04ffa2153a68b6ec164f9f6d70a1170b1b70cbac7d71","name":"Leif Nahnfeldt","registered_at":"2026-06-16T20:54:34Z","symbol":"NIM1172826","token_address":"0x64bb09210e7687b801095ef973708171cca988b8","type":"artist","uuid":"59bde7c3-c86c-48da-9e6e-40b24849cb25"}
album: En Ängel Vid Din Sida
  type: MusicAlbum
  date published: 2020-03-01
album: Snorvipas Saga. Livekonsert I Aula Magna
  type: MusicAlbum
  date published: 2020-03-15
album: E Härli Ti
  type: MusicAlbum
  date published: 2020-06-18
track: I tystnaden och sorgen - Live
  type: MusicRecording
  duration: PT3M56S
  duration ms: 236160
  explicit: false
  by artist: Körstämman i Skinnskatteberg
  by artist: Pia Östberg
  by artist: Pasi Pasanen
  by artist: Ann-Sofi Nilsson
  by artist: Leif Nahnfeldt
  in album: Guds Andedräkt
    type: MusicAlbum
    date published: 2007
  isrc code: SERFC0800106
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-31T17:02:15+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xe7d83863463dc7829281e79dde1822ae96581beefeca3792d24e8be8d4556d88
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960441
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960441
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SERFC0800106
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-31T17:29:52Z
  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 0xe7d83863463dc7829281e79dde1822ae96581beefeca3792d24e8be8d4556d88. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SERFC0800106.
    date published: 2026-07-31T17:29:52Z
  audio: I tystnaden och sorgen - Live
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 98.108
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.397
    additional property: Energy
      type: PropertyValue
      value: 0.172
    additional property: Speechiness
      type: PropertyValue
      value: 0.03
    additional property: Acousticness
      type: PropertyValue
      value: 0.903
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.287
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.353
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.857
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major