Mack Gray
type: MusicGroup
genre: bass house
description: thumb Mack Gray (December 11, 1905 – January 17, 1981) was an American actor who was the brother of Joe Gray (actor) and great-uncle of Jon Abrahams. He was given the nickname "Killer" by Carole Lom
popularity: 12
followers: 255
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xabd40725b3d5386606e3abe507e44b6d7d85ddcdbb49b7d11d1cde508e216cac
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efd7b466-0385-40f5-b06d-de491352bc38.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efd7b466-0385-40f5-b06d-de491352bc38.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/efd7b466-0385-40f5-b06d-de491352bc38
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xabd40725b3d5386606e3abe507e44b6d7d85ddcdbb49b7d11d1cde508e216cac","name":"Mack Gray","registered_at":"2026-06-15T05:43:34Z","symbol":"NIM0700036","token_address":"0xb0f8665943414a2f826bb053d8c3ddfb7d262536","type":"artist","uuid":"efd7b466-0385-40f5-b06d-de491352bc38"}
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 0xabd40725b3d5386606e3abe507e44b6d7d85ddcdbb49b7d11d1cde508e216cac. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efd7b466-0385-40f5-b06d-de491352bc38.json and https://artists.proofprofile.net/proofs/artist/efd7b466-0385-40f5-b06d-de491352bc38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:45:15Z
  text: {"copyright_id":"0xabd40725b3d5386606e3abe507e44b6d7d85ddcdbb49b7d11d1cde508e216cac","name":"Mack Gray","registered_at":"2026-06-15T05:43:34Z","symbol":"NIM0700036","token_address":"0xb0f8665943414a2f826bb053d8c3ddfb7d262536","type":"artist","uuid":"efd7b466-0385-40f5-b06d-de491352bc38"}
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  type: MusicAlbum
  date published: 2022-03-15
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