Walt Robertson
type: MusicGroup
genre: traditional music
description: Walt Robertson (12 November 1925 – 5 September 2014) was a Canadian rower. He competed in the men's eight event at the 1948 Summer Olympics. References External links Category:1925 births Categor
popularity: 2
followers: 143
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x72d2684d373ea80a6a7f46c16c0210b7700073956e34cb82de67c5316759dc06
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953984
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953984
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d2235d2-3eab-4ff4-9672-72ec255c6d56.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2d2235d2-3eab-4ff4-9672-72ec255c6d56.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2d2235d2-3eab-4ff4-9672-72ec255c6d56
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:08:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x72d2684d373ea80a6a7f46c16c0210b7700073956e34cb82de67c5316759dc06","name":"Walt Robertson","registered_at":"2026-06-16T05:16:10Z","symbol":"NIM0948881","token_address":"0x7e5b909c25f74691806774d694acc8d953a8b7a9","type":"artist","uuid":"2d2235d2-3eab-4ff4-9672-72ec255c6d56"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d2684d373ea80a6a7f46c16c0210b7700073956e34cb82de67c5316759dc06. 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/2d2235d2-3eab-4ff4-9672-72ec255c6d56.json and https://artists.proofprofile.net/proofs/artist/2d2235d2-3eab-4ff4-9672-72ec255c6d56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x72d2684d373ea80a6a7f46c16c0210b7700073956e34cb82de67c5316759dc06","name":"Walt Robertson","registered_at":"2026-06-16T05:16:10Z","symbol":"NIM0948881","token_address":"0x7e5b909c25f74691806774d694acc8d953a8b7a9","type":"artist","uuid":"2d2235d2-3eab-4ff4-9672-72ec255c6d56"}
album: American Northwest Ballads
  type: MusicAlbum
  date published: 1955-01-01
album: Walt Robertson
  type: MusicAlbum
  date published: 1959-01-01