Joseph Hartman
type: MusicGroup
genre: lo-fi
description: Joseph Hartman (January 16, 1821 – November 29, 1859) was a farmer, teacher and political figure in Canada West. He was born in Whitchurch Township in Upper Canada in 1821, the son of Quakers who had
popularity: 3
followers: 50
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaa45cbe5e3ed9d72c5cdbb1e50fd16ce439b2bdcaaeec2c6f71e13cc61e3ce2b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954125
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954125
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bf52ece-fa65-4ff3-b4ed-e24f7bbae706.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7bf52ece-fa65-4ff3-b4ed-e24f7bbae706.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7bf52ece-fa65-4ff3-b4ed-e24f7bbae706
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T18:27:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xaa45cbe5e3ed9d72c5cdbb1e50fd16ce439b2bdcaaeec2c6f71e13cc61e3ce2b","name":"Joseph Hartman","registered_at":"2026-06-17T08:48:06Z","symbol":"NIM1343032","token_address":"0x1ae476e89678cc228458bea276f6ba6a997f5e90","type":"artist","uuid":"7bf52ece-fa65-4ff3-b4ed-e24f7bbae706"}
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 0xaa45cbe5e3ed9d72c5cdbb1e50fd16ce439b2bdcaaeec2c6f71e13cc61e3ce2b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bf52ece-fa65-4ff3-b4ed-e24f7bbae706.json and https://artists.proofprofile.net/proofs/artist/7bf52ece-fa65-4ff3-b4ed-e24f7bbae706.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:07:14Z
  text: {"copyright_id":"0xaa45cbe5e3ed9d72c5cdbb1e50fd16ce439b2bdcaaeec2c6f71e13cc61e3ce2b","name":"Joseph Hartman","registered_at":"2026-06-17T08:48:06Z","symbol":"NIM1343032","token_address":"0x1ae476e89678cc228458bea276f6ba6a997f5e90","type":"artist","uuid":"7bf52ece-fa65-4ff3-b4ed-e24f7bbae706"}
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