Engine Summer
type: MusicGroup
genre: space rock
description: Engine Summer is a novel by American writer John Crowley, published in 1979 by Doubleday. It was nominated for the 1980 National Book Award for hardcover science fiction, as well as both the British F
popularity: 3
followers: 807
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff369474afb5398c5af61d89be84a880c7a73add348e33319088927ac10fed8b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/96004ca3-e350-4ed9-b564-1902c66e08cb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/96004ca3-e350-4ed9-b564-1902c66e08cb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/96004ca3-e350-4ed9-b564-1902c66e08cb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff369474afb5398c5af61d89be84a880c7a73add348e33319088927ac10fed8b","name":"Engine Summer","registered_at":"2026-06-17T17:59:02Z","symbol":"NIM1474421","token_address":"0xdd056aaeddf1cc204cdc113aff23dc415a35571f","type":"artist","uuid":"96004ca3-e350-4ed9-b564-1902c66e08cb"}
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 0xff369474afb5398c5af61d89be84a880c7a73add348e33319088927ac10fed8b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96004ca3-e350-4ed9-b564-1902c66e08cb.json and https://artists.proofprofile.net/proofs/artist/96004ca3-e350-4ed9-b564-1902c66e08cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xff369474afb5398c5af61d89be84a880c7a73add348e33319088927ac10fed8b","name":"Engine Summer","registered_at":"2026-06-17T17:59:02Z","symbol":"NIM1474421","token_address":"0xdd056aaeddf1cc204cdc113aff23dc415a35571f","type":"artist","uuid":"96004ca3-e350-4ed9-b564-1902c66e08cb"}
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