Frederik Pohl
type: MusicGroup
description: Frederik George Pohl Jr. (; November 26, 1919 – September 2, 2013) was an American science-fiction writer, editor, and fan, with a career spanning nearly 75 years—from his first published work, the 19
popularity: 5
followers: 15
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5a31f57abd4f6deb1239149f8b943371e6227679fdea4593bb039e400762daea
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44d119e3-4496-4da1-a1ae-d1da745928d8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/44d119e3-4496-4da1-a1ae-d1da745928d8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/44d119e3-4496-4da1-a1ae-d1da745928d8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5a31f57abd4f6deb1239149f8b943371e6227679fdea4593bb039e400762daea","name":"Frederik Pohl","registered_at":"2026-06-16T13:39:02Z","symbol":"NIM1068895","token_address":"0x788f24aadc8c0131022d3320c92a932dc56068c5","type":"artist","uuid":"44d119e3-4496-4da1-a1ae-d1da745928d8"}
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 0x5a31f57abd4f6deb1239149f8b943371e6227679fdea4593bb039e400762daea. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44d119e3-4496-4da1-a1ae-d1da745928d8.json and https://artists.proofprofile.net/proofs/artist/44d119e3-4496-4da1-a1ae-d1da745928d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x5a31f57abd4f6deb1239149f8b943371e6227679fdea4593bb039e400762daea","name":"Frederik Pohl","registered_at":"2026-06-16T13:39:02Z","symbol":"NIM1068895","token_address":"0x788f24aadc8c0131022d3320c92a932dc56068c5","type":"artist","uuid":"44d119e3-4496-4da1-a1ae-d1da745928d8"}
album: La prueba suprema (Completo)
  type: MusicAlbum
  date published: 1960
album: El mantenimiento de la paz
  type: MusicAlbum
  date published: 1971
album: Compramos Gente (Completo)
  type: MusicAlbum
  date published: 1974
album: Gateway (Jenseits des blauen Horizonts)
  type: MusicAlbum
  date published: 2004-08-01
album: Gateway (Rückkehr nach Gateway)
  type: MusicAlbum
  date published: 2004-08-01
album: Gateway
  type: MusicAlbum
  date published: 2004-08-01