PORK PIE HAT
type: MusicGroup
description: thumb|A classic brown felt men's pork pie hat from the 1940s. The bow in the back of the hat conceals a small button on a string which winds around the hat: in windy weather the button would be attac
popularity: 2
followers: 506
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x69cfcbec0dfd93945b88b46eb67d40647fc7475b59516bbea21716061a0eb043
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7d8c408-ebe8-422b-8b49-15fc3b242b87.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7d8c408-ebe8-422b-8b49-15fc3b242b87.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7d8c408-ebe8-422b-8b49-15fc3b242b87
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x69cfcbec0dfd93945b88b46eb67d40647fc7475b59516bbea21716061a0eb043","name":"PORK PIE HAT","registered_at":"2026-06-21T09:26:03Z","symbol":"NIM1884210","token_address":"0x8d0e7e89d8d14c05c4f49eda2136fb6bbe304293","type":"artist","uuid":"e7d8c408-ebe8-422b-8b49-15fc3b242b87"}
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 0x69cfcbec0dfd93945b88b46eb67d40647fc7475b59516bbea21716061a0eb043. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d8c408-ebe8-422b-8b49-15fc3b242b87.json and https://artists.proofprofile.net/proofs/artist/e7d8c408-ebe8-422b-8b49-15fc3b242b87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x69cfcbec0dfd93945b88b46eb67d40647fc7475b59516bbea21716061a0eb043","name":"PORK PIE HAT","registered_at":"2026-06-21T09:26:03Z","symbol":"NIM1884210","token_address":"0x8d0e7e89d8d14c05c4f49eda2136fb6bbe304293","type":"artist","uuid":"e7d8c408-ebe8-422b-8b49-15fc3b242b87"}
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