Jan Sigurd
type: MusicGroup
genre: swedish ballads
popularity: 2
followers: 127
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x668c7b6e99c87eec6a577abe1da978ce4634fe2d43bd8b049c391dfccadcf8e8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954097
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954097
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b4fd102-7cc1-4908-ae2d-0198c8343898.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b4fd102-7cc1-4908-ae2d-0198c8343898.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7b4fd102-7cc1-4908-ae2d-0198c8343898
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T13:13:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x668c7b6e99c87eec6a577abe1da978ce4634fe2d43bd8b049c391dfccadcf8e8","name":"Jan Sigurd","registered_at":"2026-06-17T08:35:40Z","symbol":"NIM1340073","token_address":"0x93efac8f0dd49017a64ef2acf1e9aa67c88e67d6","type":"artist","uuid":"7b4fd102-7cc1-4908-ae2d-0198c8343898"}
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 0x668c7b6e99c87eec6a577abe1da978ce4634fe2d43bd8b049c391dfccadcf8e8. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b4fd102-7cc1-4908-ae2d-0198c8343898.json and https://artists.proofprofile.net/proofs/artist/7b4fd102-7cc1-4908-ae2d-0198c8343898.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T13:13:51Z
  text: {"copyright_id":"0x668c7b6e99c87eec6a577abe1da978ce4634fe2d43bd8b049c391dfccadcf8e8","name":"Jan Sigurd","registered_at":"2026-06-17T08:35:40Z","symbol":"NIM1340073","token_address":"0x93efac8f0dd49017a64ef2acf1e9aa67c88e67d6","type":"artist","uuid":"7b4fd102-7cc1-4908-ae2d-0198c8343898"}
album: Tillvaratagna affekter
  type: MusicAlbum
  date published: 2010-10-01
album: Så vill jag älska dig
  type: MusicAlbum
  date published: 2011-05-01
album: Jazz för skeppsbrutna
  type: MusicAlbum
  date published: 2016-06-09
album: Höst i Lund
  type: MusicAlbum
  date published: 2018-04-06
album: In Chet Baker Land
  type: MusicAlbum
  date published: 2020-03-06