Timothy J. Campbell
type: MusicGroup
genre: choral
description: Timothy John Campbell (January 8, 1840 – April 7, 1904) was an American lawyer and politician from New York. He served four terms in the U.S. House of Representatives during the late 19th century. Li
popularity: 3
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff20e31dfa6d8999a403fbe4f112dd4953f0e7d239af6dffb50027230ebc389f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff20e31dfa6d8999a403fbe4f112dd4953f0e7d239af6dffb50027230ebc389f","name":"Timothy J. Campbell","registered_at":"2026-06-15T21:21:37Z","symbol":"NIM0835568","token_address":"0x55429c52e8ab29a691fad491963186d287b1dcd7","type":"artist","uuid":"15beeb4c-94cf-4329-9f7d-01cb8fd2d042"}
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 0xff20e31dfa6d8999a403fbe4f112dd4953f0e7d239af6dffb50027230ebc389f. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.json and https://artists.proofprofile.net/proofs/artist/15beeb4c-94cf-4329-9f7d-01cb8fd2d042.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0xff20e31dfa6d8999a403fbe4f112dd4953f0e7d239af6dffb50027230ebc389f","name":"Timothy J. Campbell","registered_at":"2026-06-15T21:21:37Z","symbol":"NIM0835568","token_address":"0x55429c52e8ab29a691fad491963186d287b1dcd7","type":"artist","uuid":"15beeb4c-94cf-4329-9f7d-01cb8fd2d042"}