David Mamet
type: MusicGroup
description: David Alan Mamet (; born November 30, 1947) is an American playwright, author, and filmmaker. He won a Pulitzer Prize and received Tony nominations for his plays Glengarry Glen Ross (1984) and Speed-t
popularity: 3
followers: 53
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff8fa38d4d5716d2d6bbc726c5134309f1c558e4ce6d060d73fe1f3f5eb32a76
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba221e4d-8777-43f9-949c-322074e48fce.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba221e4d-8777-43f9-949c-322074e48fce.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ba221e4d-8777-43f9-949c-322074e48fce
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff8fa38d4d5716d2d6bbc726c5134309f1c558e4ce6d060d73fe1f3f5eb32a76","name":"David Mamet","registered_at":"2026-06-20T16:13:09Z","symbol":"NIM1654427","token_address":"0xf731a2f7e96d39a71469a376c59bddf5999afc56","type":"artist","uuid":"ba221e4d-8777-43f9-949c-322074e48fce"}
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 0xff8fa38d4d5716d2d6bbc726c5134309f1c558e4ce6d060d73fe1f3f5eb32a76. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba221e4d-8777-43f9-949c-322074e48fce.json and https://artists.proofprofile.net/proofs/artist/ba221e4d-8777-43f9-949c-322074e48fce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0xff8fa38d4d5716d2d6bbc726c5134309f1c558e4ce6d060d73fe1f3f5eb32a76","name":"David Mamet","registered_at":"2026-06-20T16:13:09Z","symbol":"NIM1654427","token_address":"0xf731a2f7e96d39a71469a376c59bddf5999afc56","type":"artist","uuid":"ba221e4d-8777-43f9-949c-322074e48fce"}
album: Speed the Plow (Audiodrama)
  type: MusicAlbum
  date published: 2003