Andrew Appel
type: MusicGroup
description: Andrew Wilson Appel (born 1960) is the Eugene Higgins Professor of computer science at Princeton University. He is especially well known because of his compiler books, the Modern Compiler Implementati
popularity: 5
followers: 73
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x78e38b707eb12d5ef474d876e28706a3e44c6f874b8f27c9b53569fbc2fa059e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db6bf672-180e-42ea-bb0f-146029d2b0b8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db6bf672-180e-42ea-bb0f-146029d2b0b8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db6bf672-180e-42ea-bb0f-146029d2b0b8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x78e38b707eb12d5ef474d876e28706a3e44c6f874b8f27c9b53569fbc2fa059e","name":"Andrew Appel","registered_at":"2026-06-21T04:43:49Z","symbol":"NIM1822456","token_address":"0x1e2007511026ccbb5b63ec305e6f34942776bfd4","type":"artist","uuid":"db6bf672-180e-42ea-bb0f-146029d2b0b8"}
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 0x78e38b707eb12d5ef474d876e28706a3e44c6f874b8f27c9b53569fbc2fa059e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db6bf672-180e-42ea-bb0f-146029d2b0b8.json and https://artists.proofprofile.net/proofs/artist/db6bf672-180e-42ea-bb0f-146029d2b0b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x78e38b707eb12d5ef474d876e28706a3e44c6f874b8f27c9b53569fbc2fa059e","name":"Andrew Appel","registered_at":"2026-06-21T04:43:49Z","symbol":"NIM1822456","token_address":"0x1e2007511026ccbb5b63ec305e6f34942776bfd4","type":"artist","uuid":"db6bf672-180e-42ea-bb0f-146029d2b0b8"}
album: Couperin: Deuxième livre de pièces de clavecin, Ordre 6
  type: MusicAlbum
  date published: 2024-01-19