Robert Johnson
type: MusicGroup
genre: blues
description: Robert Leroy Johnson (May 8, 1911August 16, 1938) was an American blues musician and songwriter. His singing, guitar playing and songwriting on his landmark 1936 and 1937 recordings have influenced la
popularity: 2
followers: 724
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11ff36412386c8332b466165d81759741f51575afc43f4011b9da31fe9f42543
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c695920b-7b63-4268-8fe1-552fa315db13.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c695920b-7b63-4268-8fe1-552fa315db13.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c695920b-7b63-4268-8fe1-552fa315db13
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11ff36412386c8332b466165d81759741f51575afc43f4011b9da31fe9f42543","name":"Robert Johnson","registered_at":"2026-06-20T21:22:44Z","symbol":"NIM1719160","token_address":"0x23bdb4b6a6bc634caab0546adfbdd9942d5bebfa","type":"artist","uuid":"c695920b-7b63-4268-8fe1-552fa315db13"}
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 0x11ff36412386c8332b466165d81759741f51575afc43f4011b9da31fe9f42543. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c695920b-7b63-4268-8fe1-552fa315db13.json and https://artists.proofprofile.net/proofs/artist/c695920b-7b63-4268-8fe1-552fa315db13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x11ff36412386c8332b466165d81759741f51575afc43f4011b9da31fe9f42543","name":"Robert Johnson","registered_at":"2026-06-20T21:22:44Z","symbol":"NIM1719160","token_address":"0x23bdb4b6a6bc634caab0546adfbdd9942d5bebfa","type":"artist","uuid":"c695920b-7b63-4268-8fe1-552fa315db13"}
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