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: 8
followers: 127
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf35958c5abbfdf123ac300e11b58eb5c51ef2e7350cf3061bfbef5ce82f4c56e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8bbc462-091c-4447-98f5-43ac99381d35.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a8bbc462-091c-4447-98f5-43ac99381d35.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a8bbc462-091c-4447-98f5-43ac99381d35
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf35958c5abbfdf123ac300e11b58eb5c51ef2e7350cf3061bfbef5ce82f4c56e","name":"David Mamet","registered_at":"2026-06-20T08:53:52Z","symbol":"NIM1570978","token_address":"0x487b50fd8079143e31c61eb4884f3a1c4fc68acc","type":"artist","uuid":"a8bbc462-091c-4447-98f5-43ac99381d35"}
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 0xf35958c5abbfdf123ac300e11b58eb5c51ef2e7350cf3061bfbef5ce82f4c56e. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8bbc462-091c-4447-98f5-43ac99381d35.json and https://artists.proofprofile.net/proofs/artist/a8bbc462-091c-4447-98f5-43ac99381d35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0xf35958c5abbfdf123ac300e11b58eb5c51ef2e7350cf3061bfbef5ce82f4c56e","name":"David Mamet","registered_at":"2026-06-20T08:53:52Z","symbol":"NIM1570978","token_address":"0x487b50fd8079143e31c61eb4884f3a1c4fc68acc","type":"artist","uuid":"a8bbc462-091c-4447-98f5-43ac99381d35"}
album: Glengarry Glen Ross (Audiodrama)
  type: MusicAlbum
  date published: 2013-12-15
album: American Buffalo (Audiodrama)
  type: MusicAlbum
  date published: 2016-02-15