Sigmund Hjelset
type: MusicGroup
genre: avant-garde
popularity: 3
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xae14712ed8e94a806ae107a5bcc58eda455acc95eb96da150a191903045a0f98
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/539972c1-85ab-4d5f-904d-141f06378990.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/539972c1-85ab-4d5f-904d-141f06378990.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/539972c1-85ab-4d5f-904d-141f06378990
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xae14712ed8e94a806ae107a5bcc58eda455acc95eb96da150a191903045a0f98","name":"Sigmund Hjelset","registered_at":"2026-06-16T18:41:23Z","symbol":"NIM1141041","token_address":"0x39cf2cabb4bd574a512c205b78bcaf777a91f0e7","type":"artist","uuid":"539972c1-85ab-4d5f-904d-141f06378990"}
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 0xae14712ed8e94a806ae107a5bcc58eda455acc95eb96da150a191903045a0f98. 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/539972c1-85ab-4d5f-904d-141f06378990.json and https://artists.proofprofile.net/proofs/artist/539972c1-85ab-4d5f-904d-141f06378990.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xae14712ed8e94a806ae107a5bcc58eda455acc95eb96da150a191903045a0f98","name":"Sigmund Hjelset","registered_at":"2026-06-16T18:41:23Z","symbol":"NIM1141041","token_address":"0x39cf2cabb4bd574a512c205b78bcaf777a91f0e7","type":"artist","uuid":"539972c1-85ab-4d5f-904d-141f06378990"}
album: Nordic Contemporary Songs
  type: MusicAlbum
  date published: 1988