David Hörning
type: MusicGroup
popularity: 16
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc16725dcaca7880dbf0bbf9f96a136cbe4abd11e81a203c1d0aa9a231fd114bc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953621
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953621
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/21c58ce8-1b0a-4c72-9180-d63cbdfb957e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/21c58ce8-1b0a-4c72-9180-d63cbdfb957e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/21c58ce8-1b0a-4c72-9180-d63cbdfb957e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T09:42:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc16725dcaca7880dbf0bbf9f96a136cbe4abd11e81a203c1d0aa9a231fd114bc","name":"David Hörning","registered_at":"2026-06-14T07:55:48Z","symbol":"NIM0387993","token_address":"0xfae5179c10ee3a1889d98aa5b33aa9d3d02ec90e","type":"artist","uuid":"21c58ce8-1b0a-4c72-9180-d63cbdfb957e"}
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 0xc16725dcaca7880dbf0bbf9f96a136cbe4abd11e81a203c1d0aa9a231fd114bc. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21c58ce8-1b0a-4c72-9180-d63cbdfb957e.json and https://artists.proofprofile.net/proofs/artist/21c58ce8-1b0a-4c72-9180-d63cbdfb957e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T09:42:57Z
  text: {"copyright_id":"0xc16725dcaca7880dbf0bbf9f96a136cbe4abd11e81a203c1d0aa9a231fd114bc","name":"David Hörning","registered_at":"2026-06-14T07:55:48Z","symbol":"NIM0387993","token_address":"0xfae5179c10ee3a1889d98aa5b33aa9d3d02ec90e","type":"artist","uuid":"21c58ce8-1b0a-4c72-9180-d63cbdfb957e"}