Havnatt
type: MusicGroup
genre: neofolk
description: Havnatt is a neofolk musical duo hailing from Oslo, Norway. The members, Cecilie Langlie and Tom Simonsen, are members of a number of other Oslo bands including Skumring, Vagrant God and Omit. They fo
popularity: 6
followers: 3354
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc17e8936f3f067a932ca7304a268d7d8cb8db72d3a0f1f17c0bc5a9bb60f0d1c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953909
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953909
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15657524-ca70-4d5b-9e8a-10e1f3f202c6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15657524-ca70-4d5b-9e8a-10e1f3f202c6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/15657524-ca70-4d5b-9e8a-10e1f3f202c6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:53:13Z
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 0xc17e8936f3f067a932ca7304a268d7d8cb8db72d3a0f1f17c0bc5a9bb60f0d1c. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15657524-ca70-4d5b-9e8a-10e1f3f202c6.json and https://artists.proofprofile.net/proofs/artist/15657524-ca70-4d5b-9e8a-10e1f3f202c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
album: Havdøgn
  type: MusicAlbum
  date published: 2012-02-15
album: Var Je Solblesten
  type: MusicAlbum
  date published: 2012-09-25
album: Etterlatte
  type: MusicAlbum
  date published: 2013-08-15
album: Søvn I September
  type: MusicAlbum
  date published: 2014-09-01
album: Spor I Snø
  type: MusicAlbum
  date published: 2016-06-01
album: Heimferd
  type: MusicAlbum
  date published: 2016-11-15
album: Ragnhildstreet I
  type: MusicAlbum
  date published: 2019-09-25
album: Ragnhildstreet
  type: MusicAlbum
  date published: 2020-10-20
album: Gammal Bygd 1
  type: MusicAlbum
  date published: 2021-02-21
album: Dagen Og Natta
  type: MusicAlbum
  date published: 2021-06-01
album: Gammal Bygd
  type: MusicAlbum
  date published: 2022-02-22
album: Japansk Kirsebærtre
  type: MusicAlbum
  date published: 2022-03-22
album: Lys Natt
  type: MusicAlbum
  date published: 2025-09-09