Franz Keyper
type: MusicGroup
popularity: 8
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xedf239a07b9b3a07d0ef667f784bf009610cc5e8fe2fe305f1a41bb8c1d43f38
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954004
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954004
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/32d1e195-1864-4fba-927d-6aa46c9334d0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/32d1e195-1864-4fba-927d-6aa46c9334d0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/32d1e195-1864-4fba-927d-6aa46c9334d0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T21:01:04Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xedf239a07b9b3a07d0ef667f784bf009610cc5e8fe2fe305f1a41bb8c1d43f38","name":"Franz Keyper","registered_at":"2026-06-16T07:15:25Z","symbol":"NIM0977368","token_address":"0xbff6465640c7751652675eddc996c900cd87113c","type":"artist","uuid":"32d1e195-1864-4fba-927d-6aa46c9334d0"}
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 0xedf239a07b9b3a07d0ef667f784bf009610cc5e8fe2fe305f1a41bb8c1d43f38. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d1e195-1864-4fba-927d-6aa46c9334d0.json and https://artists.proofprofile.net/proofs/artist/32d1e195-1864-4fba-927d-6aa46c9334d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T21:01:04Z
  text: {"copyright_id":"0xedf239a07b9b3a07d0ef667f784bf009610cc5e8fe2fe305f1a41bb8c1d43f38","name":"Franz Keyper","registered_at":"2026-06-16T07:15:25Z","symbol":"NIM0977368","token_address":"0xbff6465640c7751652675eddc996c900cd87113c","type":"artist","uuid":"32d1e195-1864-4fba-927d-6aa46c9334d0"}
album: "Prelude" - Sir Neville Marriner Conducts Mozart, Bach, Handel, Vivaldi, Beethoven, Grieg and Others
  type: MusicAlbum
  date published: 2026-07-03