Ulf Andersson
type: MusicGroup
description: Ulf Andersson (born 27 June 1951) is a leading Swedish chess player. FIDE awarded him the International Master title in 1970 and the Grandmaster title in 1972. Chess career At his peak, Andersson rea
popularity: 2
followers: 99
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x245d9f64424ef06c2aa930167870bc51a22de661559c1185027c69300428e507
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x245d9f64424ef06c2aa930167870bc51a22de661559c1185027c69300428e507","name":"Ulf Andersson","registered_at":"2026-06-20T16:03:20Z","symbol":"NIM1649780","token_address":"0xc93ca6ff41c0c6d99e1fe45fb96cc9fad3adec48","type":"artist","uuid":"b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c"}
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 0x245d9f64424ef06c2aa930167870bc51a22de661559c1185027c69300428e507. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c.json and https://artists.proofprofile.net/proofs/artist/b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:15:05Z
  text: {"copyright_id":"0x245d9f64424ef06c2aa930167870bc51a22de661559c1185027c69300428e507","name":"Ulf Andersson","registered_at":"2026-06-20T16:03:20Z","symbol":"NIM1649780","token_address":"0xc93ca6ff41c0c6d99e1fe45fb96cc9fad3adec48","type":"artist","uuid":"b8c0f84c-2147-46c7-9b50-ff9ab9a4a76c"}
album: Flying Carpet
  type: MusicAlbum
  date published: 1998-08-01
album: Long Red Hair
  type: MusicAlbum
  date published: 2018-06-01
album: What Went so Wrong
  type: MusicAlbum
  date published: 2018-08-31