Jimmy Thörnfeldt
type: MusicGroup
description: Paul Jimmy Thörnfeldt (born 14 March 1976), also known professionally as Jimmy Joker or simply Joker, is a Swedish songwriter and record producer. As a songwriter, he has taken part in Melodifestivale
popularity: 6
followers: 22
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x41db2bfa101fa32ab2308d206b8464f780ced9c4021b51d92d475068db7d5536
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953867
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953867
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06345c9a-cd6b-4c00-aa57-d961718a0c33.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/06345c9a-cd6b-4c00-aa57-d961718a0c33.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/06345c9a-cd6b-4c00-aa57-d961718a0c33
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:09:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x41db2bfa101fa32ab2308d206b8464f780ced9c4021b51d92d475068db7d5536","name":"Jimmy Thörnfeldt","registered_at":"2026-06-15T15:40:52Z","symbol":"NIM0754276","token_address":"0x5f90f673b1f66dab4a29ea4131b4c56c2de4e5b0","type":"artist","uuid":"06345c9a-cd6b-4c00-aa57-d961718a0c33"}
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 0x41db2bfa101fa32ab2308d206b8464f780ced9c4021b51d92d475068db7d5536. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06345c9a-cd6b-4c00-aa57-d961718a0c33.json and https://artists.proofprofile.net/proofs/artist/06345c9a-cd6b-4c00-aa57-d961718a0c33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x41db2bfa101fa32ab2308d206b8464f780ced9c4021b51d92d475068db7d5536","name":"Jimmy Thörnfeldt","registered_at":"2026-06-15T15:40:52Z","symbol":"NIM0754276","token_address":"0x5f90f673b1f66dab4a29ea4131b4c56c2de4e5b0","type":"artist","uuid":"06345c9a-cd6b-4c00-aa57-d961718a0c33"}
album: Tattoo (Acoustic Version)
  type: MusicAlbum
  date published: 2023-10-09