John Lankston
type: MusicGroup
description: John Lankston (29 May, 1934 - 12 July, 2018) was an American tenor and actor who had a career in opera and musical theatre from the 1950s through the 2000s. After making his Broadway debut in Redhead
popularity: 3
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x499c4fab44599290e841222a74d6a8c4d0d15d112f1ea2e6fba0086b9112924d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954549
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954549
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a85f92c5-4479-449c-8436-8a3f848479b2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a85f92c5-4479-449c-8436-8a3f848479b2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a85f92c5-4479-449c-8436-8a3f848479b2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T10:56:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x499c4fab44599290e841222a74d6a8c4d0d15d112f1ea2e6fba0086b9112924d","name":"John Lankston","registered_at":"2026-06-20T08:34:24Z","symbol":"NIM1567836","token_address":"0x28870a45690f39c07acc780d604378c47486cee4","type":"artist","uuid":"a85f92c5-4479-449c-8436-8a3f848479b2"}
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 0x499c4fab44599290e841222a74d6a8c4d0d15d112f1ea2e6fba0086b9112924d. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a85f92c5-4479-449c-8436-8a3f848479b2.json and https://artists.proofprofile.net/proofs/artist/a85f92c5-4479-449c-8436-8a3f848479b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0x499c4fab44599290e841222a74d6a8c4d0d15d112f1ea2e6fba0086b9112924d","name":"John Lankston","registered_at":"2026-06-20T08:34:24Z","symbol":"NIM1567836","token_address":"0x28870a45690f39c07acc780d604378c47486cee4","type":"artist","uuid":"a85f92c5-4479-449c-8436-8a3f848479b2"}