Robert Jacks
type: MusicGroup
description: Robert Jacks (8 March 1943, Melbourne – 14 August 2014, Castlemaine) was an award-winning Australian painter, sculptor and printmaker and acknowledged as one of Australia's leading abstract artists.
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdb7f494fa095c3f19885672dad76c7b4cecd53231971cac10eb70cf5ab85ef28
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e69b553-6ede-452b-ab95-a01556078618.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e69b553-6ede-452b-ab95-a01556078618.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2e69b553-6ede-452b-ab95-a01556078618
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdb7f494fa095c3f19885672dad76c7b4cecd53231971cac10eb70cf5ab85ef28","name":"Robert Jacks","registered_at":"2026-06-16T05:42:51Z","symbol":"NIM0955270","token_address":"0x99cc4dc463d26f3d41a73ca65302446d4fd2c23a","type":"artist","uuid":"2e69b553-6ede-452b-ab95-a01556078618"}
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 0xdb7f494fa095c3f19885672dad76c7b4cecd53231971cac10eb70cf5ab85ef28. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e69b553-6ede-452b-ab95-a01556078618.json and https://artists.proofprofile.net/proofs/artist/2e69b553-6ede-452b-ab95-a01556078618.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xdb7f494fa095c3f19885672dad76c7b4cecd53231971cac10eb70cf5ab85ef28","name":"Robert Jacks","registered_at":"2026-06-16T05:42:51Z","symbol":"NIM0955270","token_address":"0x99cc4dc463d26f3d41a73ca65302446d4fd2c23a","type":"artist","uuid":"2e69b553-6ede-452b-ab95-a01556078618"}