William Close
type: MusicGroup
description: William Taliaferro Close (June 7, 1924 – January 15, 2009) was an American surgeon who played a major role in stemming a 1976 outbreak of the Ebola virus in Zaire, the first major outbreak of the vira
popularity: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcd2b83e881838a42961f405427ab52268cbf069b89233452e5587cec1b598677
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953973
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953973
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2ad62139-0b3e-445b-bf93-56058bbf8b79.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2ad62139-0b3e-445b-bf93-56058bbf8b79.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2ad62139-0b3e-445b-bf93-56058bbf8b79
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:37:07Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcd2b83e881838a42961f405427ab52268cbf069b89233452e5587cec1b598677","name":"William Close","registered_at":"2026-06-16T04:25:41Z","symbol":"NIM0936825","token_address":"0x0ac5b676183047505431194a5d40edd4ae021974","type":"artist","uuid":"2ad62139-0b3e-445b-bf93-56058bbf8b79"}
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 0xcd2b83e881838a42961f405427ab52268cbf069b89233452e5587cec1b598677. Chain 2 (Bitcoin): anchored in block 953973 (2026-06-16T16:37:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ad62139-0b3e-445b-bf93-56058bbf8b79.json and https://artists.proofprofile.net/proofs/artist/2ad62139-0b3e-445b-bf93-56058bbf8b79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:37:07Z
  text: {"copyright_id":"0xcd2b83e881838a42961f405427ab52268cbf069b89233452e5587cec1b598677","name":"William Close","registered_at":"2026-06-16T04:25:41Z","symbol":"NIM0936825","token_address":"0x0ac5b676183047505431194a5d40edd4ae021974","type":"artist","uuid":"2ad62139-0b3e-445b-bf93-56058bbf8b79"}