Geoffrey Holder
type: MusicGroup
description: Geoffrey Lamont Holder (August 1, 1930 – October 5, 2014) was a Trinidadian-American actor, dancer, musician, director, choreographer, and artist. He was a principal dancer for the Metropolitan Opera
popularity: 18
followers: 36
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x34531499fdcd0daff9e9911a6d87d591544ad438fffcc6d7dc6e12bf329bfe7c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e17fe966-2b55-4e36-804f-5e34902e4812.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e17fe966-2b55-4e36-804f-5e34902e4812.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e17fe966-2b55-4e36-804f-5e34902e4812
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x34531499fdcd0daff9e9911a6d87d591544ad438fffcc6d7dc6e12bf329bfe7c","name":"Geoffrey Holder","registered_at":"2026-06-15T04:13:08Z","symbol":"NIM0678446","token_address":"0xf01a6ef6a4c160643884556d0e25ed6aed99f1fa","type":"artist","uuid":"e17fe966-2b55-4e36-804f-5e34902e4812"}
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 0x34531499fdcd0daff9e9911a6d87d591544ad438fffcc6d7dc6e12bf329bfe7c. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e17fe966-2b55-4e36-804f-5e34902e4812.json and https://artists.proofprofile.net/proofs/artist/e17fe966-2b55-4e36-804f-5e34902e4812.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T15:41:00Z
  text: {"copyright_id":"0x34531499fdcd0daff9e9911a6d87d591544ad438fffcc6d7dc6e12bf329bfe7c","name":"Geoffrey Holder","registered_at":"2026-06-15T04:13:08Z","symbol":"NIM0678446","token_address":"0xf01a6ef6a4c160643884556d0e25ed6aed99f1fa","type":"artist","uuid":"e17fe966-2b55-4e36-804f-5e34902e4812"}