Michael Kröger
type: MusicGroup
popularity: 5
followers: 17
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3101704a31c7f704807bf5b2b962e2d71fc0c903c8c94fa446de3b982843a1a1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef481960-cb24-4f85-933e-628dce6813b0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef481960-cb24-4f85-933e-628dce6813b0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef481960-cb24-4f85-933e-628dce6813b0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3101704a31c7f704807bf5b2b962e2d71fc0c903c8c94fa446de3b982843a1a1","name":"Michael Kröger","registered_at":"2026-06-21T12:37:28Z","symbol":"NIM1921207","token_address":"0x25933927b3bae06b54432108fd73b4c78491e80c","type":"artist","uuid":"ef481960-cb24-4f85-933e-628dce6813b0"}
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 0x3101704a31c7f704807bf5b2b962e2d71fc0c903c8c94fa446de3b982843a1a1. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef481960-cb24-4f85-933e-628dce6813b0.json and https://artists.proofprofile.net/proofs/artist/ef481960-cb24-4f85-933e-628dce6813b0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x3101704a31c7f704807bf5b2b962e2d71fc0c903c8c94fa446de3b982843a1a1","name":"Michael Kröger","registered_at":"2026-06-21T12:37:28Z","symbol":"NIM1921207","token_address":"0x25933927b3bae06b54432108fd73b4c78491e80c","type":"artist","uuid":"ef481960-cb24-4f85-933e-628dce6813b0"}