Stefan Roos
type: MusicGroup
description: Klas Stefan Roos (born 3 February 1970) is a Swedish actor and screen writer. Roos finished NAMA in Stockholm in 1993. He is married to the actress Elisabet Carlsson and together they have a daughter.
popularity: 3
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb3b1d34b8a4bf11df9a72303b34713e2b82911b94d39e62622a489a3555ebf35
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bfe146c-54d6-43bb-867a-d41f1864c96f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bfe146c-54d6-43bb-867a-d41f1864c96f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7bfe146c-54d6-43bb-867a-d41f1864c96f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb3b1d34b8a4bf11df9a72303b34713e2b82911b94d39e62622a489a3555ebf35","name":"Stefan Roos","registered_at":"2026-06-17T08:54:16Z","symbol":"NIM1344497","token_address":"0xadcc57771a2ce039e8cb596b54237e9a260bb935","type":"artist","uuid":"7bfe146c-54d6-43bb-867a-d41f1864c96f"}
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 0xb3b1d34b8a4bf11df9a72303b34713e2b82911b94d39e62622a489a3555ebf35. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bfe146c-54d6-43bb-867a-d41f1864c96f.json and https://artists.proofprofile.net/proofs/artist/7bfe146c-54d6-43bb-867a-d41f1864c96f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0xb3b1d34b8a4bf11df9a72303b34713e2b82911b94d39e62622a489a3555ebf35","name":"Stefan Roos","registered_at":"2026-06-17T08:54:16Z","symbol":"NIM1344497","token_address":"0xadcc57771a2ce039e8cb596b54237e9a260bb935","type":"artist","uuid":"7bfe146c-54d6-43bb-867a-d41f1864c96f"}