Robert Hoff
type: MusicGroup
description: Robert Hoff was an American football player and coach. He was a three-time letter letterwinner at the University of Iowa from 1948 to 1950, starring as an end. He served as the head football coach at
popularity: 3
followers: 302
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4e69700cea981180d22bf341733118e8a1a4ad8435c74032be5dd5cf37c0a01d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954134
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954134
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7e7042b4-2e1f-4c21-9702-fa76a79086df.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7e7042b4-2e1f-4c21-9702-fa76a79086df.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7e7042b4-2e1f-4c21-9702-fa76a79086df
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:41:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4e69700cea981180d22bf341733118e8a1a4ad8435c74032be5dd5cf37c0a01d","name":"Robert Hoff","registered_at":"2026-06-17T09:43:25Z","symbol":"NIM1356227","token_address":"0x306b10a0685d39ccfb22abc5e33e3f7288853bbd","type":"artist","uuid":"7e7042b4-2e1f-4c21-9702-fa76a79086df"}
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 0x4e69700cea981180d22bf341733118e8a1a4ad8435c74032be5dd5cf37c0a01d. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e7042b4-2e1f-4c21-9702-fa76a79086df.json and https://artists.proofprofile.net/proofs/artist/7e7042b4-2e1f-4c21-9702-fa76a79086df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-18T03:01:36Z
  text: {"copyright_id":"0x4e69700cea981180d22bf341733118e8a1a4ad8435c74032be5dd5cf37c0a01d","name":"Robert Hoff","registered_at":"2026-06-17T09:43:25Z","symbol":"NIM1356227","token_address":"0x306b10a0685d39ccfb22abc5e33e3f7288853bbd","type":"artist","uuid":"7e7042b4-2e1f-4c21-9702-fa76a79086df"}
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