Karlsen
type: MusicGroup
description: Karlsen is a Danish-Norwegian patronymic surname meaning "son of Karl" (\k(a)-rl\), an Old German given name. The form Carlsen is cognate. The parallel Swedish forms are Karlsson and Carlsson. People
popularity: 4
followers: 114
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa0d480b33a1eb89598f8dfa0e6febda1dad311a091b5a8d6072131241e0c735f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954050
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954050
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42dbe777-3c7d-4291-bbf4-f4ce525299bf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42dbe777-3c7d-4291-bbf4-f4ce525299bf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42dbe777-3c7d-4291-bbf4-f4ce525299bf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T05:14:33Z
additional property: OTSCanonicalRecord
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 0xa0d480b33a1eb89598f8dfa0e6febda1dad311a091b5a8d6072131241e0c735f. 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/42dbe777-3c7d-4291-bbf4-f4ce525299bf.json and https://artists.proofprofile.net/proofs/artist/42dbe777-3c7d-4291-bbf4-f4ce525299bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: Nu er det sommer
  type: MusicAlbum
  date published: 2018-06-05
album: Skipper vil have kaffe
  type: MusicAlbum
  date published: 2019-07-08
album: Skipper vil have kaffe
  type: MusicAlbum
  date published: 2019-07-08
album: Østerbro
  type: MusicAlbum
  date published: 2019-10-14
album: Østerbro
  type: MusicAlbum
  date published: 2019-10-14