Mattis Lehmann
type: MusicGroup
popularity: 12
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xde1a71b381e84cdf83a13cb46ce8901e0d94f444b066972ee36f73897452c6c2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953701
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953701
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/76231f05-741a-4bcc-8bb3-f514d726b407.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/76231f05-741a-4bcc-8bb3-f514d726b407.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/76231f05-741a-4bcc-8bb3-f514d726b407
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:16:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xde1a71b381e84cdf83a13cb46ce8901e0d94f444b066972ee36f73897452c6c2","name":"Mattis Lehmann","registered_at":"2026-06-14T16:53:24Z","symbol":"NIM0516248","token_address":"0xa96165fec1ead41130bf76c8eb0882a1cfbd820a","type":"artist","uuid":"76231f05-741a-4bcc-8bb3-f514d726b407"}
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 0xde1a71b381e84cdf83a13cb46ce8901e0d94f444b066972ee36f73897452c6c2. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76231f05-741a-4bcc-8bb3-f514d726b407.json and https://artists.proofprofile.net/proofs/artist/76231f05-741a-4bcc-8bb3-f514d726b407.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-14T22:16:40Z
  text: {"copyright_id":"0xde1a71b381e84cdf83a13cb46ce8901e0d94f444b066972ee36f73897452c6c2","name":"Mattis Lehmann","registered_at":"2026-06-14T16:53:24Z","symbol":"NIM0516248","token_address":"0xa96165fec1ead41130bf76c8eb0882a1cfbd820a","type":"artist","uuid":"76231f05-741a-4bcc-8bb3-f514d726b407"}