Duncan Robertson
type: MusicGroup
genre: opera
description: Duncan John Robertson (born 6 February 1947) is a former New Zealand rugby union player. He represented Otago at a provincial level, making 104 appearances and playing most of his games at second five
popularity: 4
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcfa3828306ab3a9a8ca10794027ad0d922ee71445175f4ca4c76d8aafb5286d8
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/803b5909-c27c-4a79-940a-f165d966ca52.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/803b5909-c27c-4a79-940a-f165d966ca52.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/803b5909-c27c-4a79-940a-f165d966ca52
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcfa3828306ab3a9a8ca10794027ad0d922ee71445175f4ca4c76d8aafb5286d8","name":"Duncan Robertson","registered_at":"2026-06-17T10:22:36Z","symbol":"NIM1365581","token_address":"0xae87b4b2df49b99bc21b35ecae156f9a1d1b9d58","type":"artist","uuid":"803b5909-c27c-4a79-940a-f165d966ca52"}
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 0xcfa3828306ab3a9a8ca10794027ad0d922ee71445175f4ca4c76d8aafb5286d8. 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/803b5909-c27c-4a79-940a-f165d966ca52.json and https://artists.proofprofile.net/proofs/artist/803b5909-c27c-4a79-940a-f165d966ca52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xcfa3828306ab3a9a8ca10794027ad0d922ee71445175f4ca4c76d8aafb5286d8","name":"Duncan Robertson","registered_at":"2026-06-17T10:22:36Z","symbol":"NIM1365581","token_address":"0xae87b4b2df49b99bc21b35ecae156f9a1d1b9d58","type":"artist","uuid":"803b5909-c27c-4a79-940a-f165d966ca52"}