Jacob Fischer
type: MusicGroup
genre: jazz
genre: smooth jazz
genre: vocal jazz
description: Jacob Fischer (born 1967) is a self-taught Danish jazz guitarist. Since 1992 he has been a member of the Svend Asmussen Quartet and founded the Jacob Fischer Trio, where he plays alongside Hugo Rasmus
popularity: 29
followers: 1140
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87102aca3eeb1dc61971dd1cdfd493ba0e02a41e565c550d8793d4abe89108bb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b5830c18-5706-4d86-9fa1-d569fca9fea2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b5830c18-5706-4d86-9fa1-d569fca9fea2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b5830c18-5706-4d86-9fa1-d569fca9fea2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x87102aca3eeb1dc61971dd1cdfd493ba0e02a41e565c550d8793d4abe89108bb","name":"Jacob Fischer","registered_at":"2026-06-12T07:56:40Z","symbol":"NIM0234829","token_address":"0xea319b1bf56f25d7e4926abde3a7643c44ed7f41","type":"artist","uuid":"b5830c18-5706-4d86-9fa1-d569fca9fea2"}
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 0x87102aca3eeb1dc61971dd1cdfd493ba0e02a41e565c550d8793d4abe89108bb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5830c18-5706-4d86-9fa1-d569fca9fea2.json and https://artists.proofprofile.net/proofs/artist/b5830c18-5706-4d86-9fa1-d569fca9fea2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x87102aca3eeb1dc61971dd1cdfd493ba0e02a41e565c550d8793d4abe89108bb","name":"Jacob Fischer","registered_at":"2026-06-12T07:56:40Z","symbol":"NIM0234829","token_address":"0xea319b1bf56f25d7e4926abde3a7643c44ed7f41","type":"artist","uuid":"b5830c18-5706-4d86-9fa1-d569fca9fea2"}
album: Jazzen ifølge ... Erik Rasmussen
  type: MusicAlbum
  date published: 2014-01-27