David C. Knapp
type: MusicGroup
description: David C. Knapp (November 13, 1927 – April 13, 2010) was an American educational administrator. Biography Knapp was born in Syracuse, New York, in 1927, and received his B.A. in political science fr
popularity: 5
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x89c8e7c6631df9e0c09431305cf07554b4c8608ddcd335ab9d3804eb8d8d1e1f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/581a0aaa-68ae-46a3-a13a-41528c0a2b59.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/581a0aaa-68ae-46a3-a13a-41528c0a2b59.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/581a0aaa-68ae-46a3-a13a-41528c0a2b59
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x89c8e7c6631df9e0c09431305cf07554b4c8608ddcd335ab9d3804eb8d8d1e1f","name":"David C. Knapp","registered_at":"2026-06-16T20:23:54Z","symbol":"NIM1165509","token_address":"0x16775ea74810c8ee52c51c35ae693ed6671f2fcb","type":"artist","uuid":"581a0aaa-68ae-46a3-a13a-41528c0a2b59"}
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 0x89c8e7c6631df9e0c09431305cf07554b4c8608ddcd335ab9d3804eb8d8d1e1f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/581a0aaa-68ae-46a3-a13a-41528c0a2b59.json and https://artists.proofprofile.net/proofs/artist/581a0aaa-68ae-46a3-a13a-41528c0a2b59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x89c8e7c6631df9e0c09431305cf07554b4c8608ddcd335ab9d3804eb8d8d1e1f","name":"David C. Knapp","registered_at":"2026-06-16T20:23:54Z","symbol":"NIM1165509","token_address":"0x16775ea74810c8ee52c51c35ae693ed6671f2fcb","type":"artist","uuid":"581a0aaa-68ae-46a3-a13a-41528c0a2b59"}