Rolf Johansson
type: MusicGroup
description: Rolf Johansson (born 21 July 1944) is a Swedish former Paralympic athlete. He competed in a variety of sports, including athletics, ice sledge speed racing, ice sledge hockey, and wheelchair curling.
popularity: 2
followers: 271
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7055bfd35643f0ac63ebcb7d4d172e8fbd5ff9a69eaaa858767b69dd6f81391b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f265eaaa-3f22-45b7-b1da-288f96032904.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f265eaaa-3f22-45b7-b1da-288f96032904.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f265eaaa-3f22-45b7-b1da-288f96032904
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7055bfd35643f0ac63ebcb7d4d172e8fbd5ff9a69eaaa858767b69dd6f81391b","name":"Rolf Johansson","registered_at":"2026-06-21T13:33:51Z","symbol":"NIM1936736","token_address":"0x59bba9437501356cae85eaeff7fb1b7af1843ad5","type":"artist","uuid":"f265eaaa-3f22-45b7-b1da-288f96032904"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7055bfd35643f0ac63ebcb7d4d172e8fbd5ff9a69eaaa858767b69dd6f81391b. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f265eaaa-3f22-45b7-b1da-288f96032904.json and https://artists.proofprofile.net/proofs/artist/f265eaaa-3f22-45b7-b1da-288f96032904.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x7055bfd35643f0ac63ebcb7d4d172e8fbd5ff9a69eaaa858767b69dd6f81391b","name":"Rolf Johansson","registered_at":"2026-06-21T13:33:51Z","symbol":"NIM1936736","token_address":"0x59bba9437501356cae85eaeff7fb1b7af1843ad5","type":"artist","uuid":"f265eaaa-3f22-45b7-b1da-288f96032904"}
album: Innan jag gror
  type: MusicAlbum
  date published: 2015-04-30
album: Innan jag gror - Single
  type: MusicAlbum
  date published: 2015-04-30
album: Bättre
  type: MusicAlbum
  date published: 2015-11-13
album: Bättre
  type: MusicAlbum
  date published: 2015-11-13
album: Älskling
  type: MusicAlbum
  date published: 2015-11-27
album: Älskling
  type: MusicAlbum
  date published: 2015-11-27
album: Ole dole doff
  type: MusicAlbum
  date published: 2016-04-15
album: Ole dole doff
  type: MusicAlbum
  date published: 2016-04-15
album: One Love
  type: MusicAlbum
  date published: 2017-05-19