Martin Widmark
type: MusicGroup
description: Karl Martino Widmark (born 19 March 1961)Swedish birthday website is a Swedish children's writer and teacher. His books about LasseMaja junior mysteries, in English named The Whodunit Detective Agency
popularity: 28
followers: 1660
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0e7591883d2c3f6a3c4a9a163e7532c902bd0ca0b7d599948fb38b9faa7079be
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2560dd20-0461-431c-ab57-6b6ec33237de.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2560dd20-0461-431c-ab57-6b6ec33237de.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2560dd20-0461-431c-ab57-6b6ec33237de
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0e7591883d2c3f6a3c4a9a163e7532c902bd0ca0b7d599948fb38b9faa7079be","name":"Martin Widmark","registered_at":"2026-06-11T14:25:37Z","symbol":"NIM0048464","token_address":"0x05a6473e9d85a96f7f5dd801f918a27f1521591f","type":"artist","uuid":"2560dd20-0461-431c-ab57-6b6ec33237de"}
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 0x0e7591883d2c3f6a3c4a9a163e7532c902bd0ca0b7d599948fb38b9faa7079be. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2560dd20-0461-431c-ab57-6b6ec33237de.json and https://artists.proofprofile.net/proofs/artist/2560dd20-0461-431c-ab57-6b6ec33237de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x0e7591883d2c3f6a3c4a9a163e7532c902bd0ca0b7d599948fb38b9faa7079be","name":"Martin Widmark","registered_at":"2026-06-11T14:25:37Z","symbol":"NIM0048464","token_address":"0x05a6473e9d85a96f7f5dd801f918a27f1521591f","type":"artist","uuid":"2560dd20-0461-431c-ab57-6b6ec33237de"}
album: Het Krantengeheim [Detectivebureau Lars & Maja, Deel 1 (Onverkort)]
  type: MusicAlbum
  date published: 2008-04-17
album: Het Geheim van de dierenwinkel [Detectivebureau Lars & Maja, Deel 2 (Onverkort)]
  type: MusicAlbum
  date published: 2009-03-04
album: Das Zirkusgeheimnis [Detektivbüro LasseMaja, Teil 6 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Das Mumiengeheimnis [Detektivbüro LasseMaja, Teil 2 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Das Zeitungsgeheimnis [Detektivbüro LasseMaja, Teil 7 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Detektivbüro LasseMaja - Das Mumiengeheimnis
  type: MusicAlbum
  date published: 2010
album: Das Tiergeheimnis [Detektivbüro LasseMaja, Teil 4 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Das Cafégeheimnis [Detektivbüro LasseMaja, Teil 5 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Das Diamantengeheimnis [Detektivbüro LasseMaja, Teil 3 (ungekürzt)]
  type: MusicAlbum
  date published: 2010
album: Das Schulgeheimnis [Detektivbüro LasseMaja, Teil 1 (ungekürzt)]
  type: MusicAlbum
  date published: 2011
album: Das Kinogeheimnis [Detektivbüro LasseMaja, Teil 9 (ungekürzt)]
  type: MusicAlbum
  date published: 2011
album: Detektivbüro LasseMaja - Das Tiergeheimnis
  type: MusicAlbum
  date published: 2011
album: Das Campinggeheimnis [Detektivbüro LasseMaja, Teil 8 (ungekürzt)]
  type: MusicAlbum
  date published: 2011
album: Detektivbüro LasseMaja - Das Schulgeheimnis
  type: MusicAlbum
  date published: 2011
album: Das Goldgeheimnis [Detektivbüro LasseMaja, Teil 10 (ungekürzt)]
  type: MusicAlbum
  date published: 2011
album: Detektivbüro LasseMaja - Das Diamantengeheimnis
  type: MusicAlbum
  date published: 2011-07-11
album: Detektivbüro LasseMaja - Das Goldgeheimnis
  type: MusicAlbum
  date published: 2011-07-15
album: Detektivbüro LasseMaja - Das Zirkusgeheimnis
  type: MusicAlbum
  date published: 2012
album: Das Eisenbahngeheimnis [Detektivbüro LasseMaja, Teil 14 (ungekürzt)]
  type: MusicAlbum
  date published: 2012
album: Das Fußballgeheimnis [Detektivbüro LasseMaja, Teil 11 (ungekürzt)]
  type: MusicAlbum
  date published: 2012
album: Detektivbüro LasseMaja - Das Campinggeheimnis
  type: MusicAlbum
  date published: 2012
album: Das Bibliotheksgeheimnis [Detektivbüro LasseMaja, Teil 12 (ungekürzt)]
  type: MusicAlbum
  date published: 2012
album: Das Kirchengeheimnis [Detektivbüro LasseMaja, Teil 18 (ungekürzt)]
  type: MusicAlbum
  date published: 2012
album: Detektivbüro LasseMaja - Das Zeitungsgeheimnis
  type: MusicAlbum
  date published: 2012-07-09
album: Detektivbüro LasseMaja - Das Cafégeheimnis
  type: MusicAlbum
  date published: 2012-07-09
album: Das Krankenhausgeheimnis [Detektivbüro LasseMaja, Teil 17 (ungekürzt)]
  type: MusicAlbum
  date published: 2013
album: Das Safrangeheimnis [Detektivbüro LasseMaja, Teil 16 (ungekürzt)]
  type: MusicAlbum
  date published: 2013
album: Das Liebesgeheimnis [Detektivbüro LasseMaja, Teil 15 (ungekürzt)]
  type: MusicAlbum
  date published: 2013
album: Detektivbüro LasseMaja - Das Bibliotheksgeheimnis
  type: MusicAlbum
  date published: 2013
album: Detektivbüro LasseMaja - Das Liebesgeheimnis
  type: MusicAlbum
  date published: 2013-01-17
album: Detektivbüro LasseMaja - Das Safrangeheimnis
  type: MusicAlbum
  date published: 2013-09-02
album: Detektivbüro LasseMaja - Das Krankenhausgeheimnis
  type: MusicAlbum
  date published: 2013-09-09
album: Detektivbüro LasseMaja - Das Fußballgeheimnis
  type: MusicAlbum
  date published: 2013-12-03
album: Detektivbüro LasseMaja - Das Kinogeheimnis
  type: MusicAlbum
  date published: 2013-12-17
album: Das Hotelgeheimnis [Detektivbüro LasseMaja, Teil 19 (ungekürzt)]
  type: MusicAlbum
  date published: 2014
album: Das Geburtstagsgeheimnis [Detektivbüro LasseMaja, Teil 20 (ungekürzt)]
  type: MusicAlbum
  date published: 2014
album: Detektivbüro LasseMaja - Das Kirchengeheimnis
  type: MusicAlbum
  date published: 2014-03-06
album: Detektivbüro LasseMaja - Das Hotelgeheimnis
  type: MusicAlbum
  date published: 2014-09-12
album: Das Fahrradgeheimnis [Detektivbüro LasseMaja, Teil 22 (ungekürzt)]
  type: MusicAlbum
  date published: 2015
album: Detektivbüro LasseMaja - Das Geburtstagsgeheimnis
  type: MusicAlbum
  date published: 2015-01-14
album: Detektivbüro LasseMaja - Das Eisenbahngeheimnis
  type: MusicAlbum
  date published: 2015-08-17
album: Het Circusgeheim [Detectivebureau Lars & Maja, Deel 5 (Onverkort)]
  type: MusicAlbum
  date published: 2015-12-01
album: Het geheim van de mummie [Detectivebureau Lars & Maja, Deel 3 (Onverkort)]
  type: MusicAlbum
  date published: 2015-12-01
album: Het Liefdesgeheim [Detectivebureau Lars & Maja, Deel 4 (Onverkort)]
  type: MusicAlbum
  date published: 2015-12-01
album: Detektivbüro LasseMaja - Das Fahrradgeheimnis
  type: MusicAlbum
  date published: 2016-01-14
album: Detektivbüro LasseMaja - Das Feuerwehrgeheimnis
  type: MusicAlbum
  date published: 2016-07-18
album: Detektivbüro LasseMaja - Das Gefängnisgeheimnis
  type: MusicAlbum
  date published: 2017-01-19
album: Das Feuerwehrgeheimnis [Detektivbüro LasseMaja, Teil 23 (ungekürzt)]
  type: MusicAlbum
  date published: 2017-03-17
album: Detektivbüro LasseMaja - Das Katzengeheimnis
  type: MusicAlbum
  date published: 2017-07-14
album: Das Katzengeheimnis [Detektivbüro LasseMaja, Teil 25 (ungekürzt)]
  type: MusicAlbum
  date published: 2018-02-09
album: Das Gefängnisgeheimnis [Detektivbüro LasseMaja, Teil 24 (ungekürzt)]
  type: MusicAlbum
  date published: 2018-02-09
album: Detektivbüro LasseMaja - Das Wikingergeheimnis
  type: MusicAlbum
  date published: 2019-07-12
album: Detektivbüro LasseMaja - Das Schlossgeheimnis
  type: MusicAlbum
  date published: 2019-08-15
album: Das Schlossgeheimnis [Detektivbüro LasseMaja, Teil 26 (ungekürzt)]
  type: MusicAlbum
  date published: 2019-08-16
album: Das Wikingergeheimnis [Detektivbüro LasseMaja, Teil 29 (ungekürzt)]
album: Detektivbüro LasseMaja - Das Filmgeheimnis
album: Das Filmgeheimnis [Detektivbüro LasseMaja, Teil 30 (ungekürzt)]
album: Detektivbüro LasseMaja – Das Strandgeheimnis
album: Das Strandgeheimnis [Detektivbüro LasseMaja, Teil 33 (ungekürzt)]
album: Das Musikgeheimnis [Detektivbüro LasseMaja, Teil 34 (ungekürzt)]
album: Detektivbüro LasseMaja - Das Musikgeheimnis
album: Das Dinogeheimnis [Detektivbüro LasseMaja, Teil 36 (Ungekürzt)]

Das Wikingergeheimnis [Detektivbüro LasseMaja, Teil 29 (ungekürzt)]
type: MusicAlbum
date published: 2020-02-12

Detektivbüro LasseMaja - Das Filmgeheimnis
type: MusicAlbum
date published: 2020-07-20

Das Filmgeheimnis [Detektivbüro LasseMaja, Teil 30 (ungekürzt)]
type: MusicAlbum
date published: 2021-02-10

Detektivbüro LasseMaja – Das Strandgeheimnis
type: MusicAlbum
date published: 2022-02-08

Das Strandgeheimnis [Detektivbüro LasseMaja, Teil 33 (ungekürzt)]
type: MusicAlbum
date published: 2022-02-08

Das Musikgeheimnis [Detektivbüro LasseMaja, Teil 34 (ungekürzt)]
type: MusicAlbum
date published: 2022-02-08

Detektivbüro LasseMaja - Das Musikgeheimnis
type: MusicAlbum
date published: 2022-02-08

Das Dinogeheimnis [Detektivbüro LasseMaja, Teil 36 (Ungekürzt)]
type: MusicAlbum
date published: 2025-02-12
track: Kapitel 4 - Das Dinogeheimnis - Detektivbüro LasseMaja, Teil 36
  type: MusicRecording
  duration: PT3M4S
  duration ms: 184255
  explicit: false
  by artist: Martin Widmark
  in album: Das Dinogeheimnis [Detektivbüro LasseMaja, Teil 36 (Ungekürzt)]
    type: MusicAlbum
    date published: 2025-02-12
  isrc code: DEUE12586603
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T08:19:51+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x40c73d11a0c72a5d629904975bcace1b745eb98523a613ad6651439fc08a02cc
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958853
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958853
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE12586603
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T11:22:52Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c73d11a0c72a5d629904975bcace1b745eb98523a613ad6651439fc08a02cc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:22:52Z), 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/DEUE12586603.
    date published: 2026-07-20T11:22:52Z
  audio: Kapitel 4 - Das Dinogeheimnis - Detektivbüro LasseMaja, Teil 36
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 60.213
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
      value: 0.731
    additional property: Energy
      type: PropertyValue
      value: 0.319
    additional property: Speechiness
      type: PropertyValue
      value: 0.952
    additional property: Acousticness
      type: PropertyValue
      value: 0.204
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.082
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.233
    additional property: Loudness (dB)
      type: PropertyValue
      value: -15.29
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major