Art James
type: MusicGroup
description: Art James (born Arthur Simeonovich Efimchick; October 15, 1929 – March 28, 2004) was an American game-show host, best known for shows such as The Who, What, or Where Game; It's Academic; and Pay Cards
popularity: 3
followers: 61
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2dc60da98f1964079ea620c78f6c67a44923bdd884e0bf5fb43fab8c3b525486
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f0fa312-8043-4b83-99e7-971c11005774.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8f0fa312-8043-4b83-99e7-971c11005774.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8f0fa312-8043-4b83-99e7-971c11005774
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2dc60da98f1964079ea620c78f6c67a44923bdd884e0bf5fb43fab8c3b525486","name":"Art James","registered_at":"2026-06-17T15:31:11Z","symbol":"NIM1439110","token_address":"0x1b12ea47ce6aca0a0167c68afd1c259aa2ba9776","type":"artist","uuid":"8f0fa312-8043-4b83-99e7-971c11005774"}
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 0x2dc60da98f1964079ea620c78f6c67a44923bdd884e0bf5fb43fab8c3b525486. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f0fa312-8043-4b83-99e7-971c11005774.json and https://artists.proofprofile.net/proofs/artist/8f0fa312-8043-4b83-99e7-971c11005774.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x2dc60da98f1964079ea620c78f6c67a44923bdd884e0bf5fb43fab8c3b525486","name":"Art James","registered_at":"2026-06-17T15:31:11Z","symbol":"NIM1439110","token_address":"0x1b12ea47ce6aca0a0167c68afd1c259aa2ba9776","type":"artist","uuid":"8f0fa312-8043-4b83-99e7-971c11005774"}
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