Halvar Björk
type: MusicGroup
genre: swedish ballads
description: Erik Halvar Bertil Björk (22 September 1928 – 12 November 2000) was a Swedish actor. He worked at the Malmö City Theatre from 1962 to 1986, and he had many substantial film and TV roles; for example,
popularity: 4
followers: 37
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x77feb855c5d74b123d8aafb8904eded7ba8712c0e993e54445ef597768aff8de
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954623
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954623
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:40:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x77feb855c5d74b123d8aafb8904eded7ba8712c0e993e54445ef597768aff8de","name":"Halvar Björk","registered_at":"2026-06-20T23:03:26Z","symbol":"NIM1741314","token_address":"0x00bfbda1d4a6f725f9142ae17920a0090f80a5a4","type":"artist","uuid":"cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd"}
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 0x77feb855c5d74b123d8aafb8904eded7ba8712c0e993e54445ef597768aff8de. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd.json and https://artists.proofprofile.net/proofs/artist/cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:40:06Z
  text: {"copyright_id":"0x77feb855c5d74b123d8aafb8904eded7ba8712c0e993e54445ef597768aff8de","name":"Halvar Björk","registered_at":"2026-06-20T23:03:26Z","symbol":"NIM1741314","token_address":"0x00bfbda1d4a6f725f9142ae17920a0090f80a5a4","type":"artist","uuid":"cb3b4194-b2a9-4f6d-90bf-19f950dbf0bd"}