Kolja Lessing
type: MusicGroup
description: Kolja Lessing (born 15 October 1961) is a German violinist, pianist, composer and academic teacher. His focus as a soloist and chamber musician has been the neglected repertoire by composers who were
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x40e5d296e7038056bc881feaa98d746a36f48e0895df83073c7928907298cd2f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953846
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953846
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/008fee39-fb76-49a5-8540-38bd706e47e0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/008fee39-fb76-49a5-8540-38bd706e47e0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/008fee39-fb76-49a5-8540-38bd706e47e0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:48:34Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x40e5d296e7038056bc881feaa98d746a36f48e0895df83073c7928907298cd2f","name":"Kolja Lessing","registered_at":"2026-06-15T13:54:45Z","symbol":"NIM0728948","token_address":"0xb1c6d735cf6593dd28619c7154ae620abf3ef9bf","type":"artist","uuid":"008fee39-fb76-49a5-8540-38bd706e47e0"}
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 0x40e5d296e7038056bc881feaa98d746a36f48e0895df83073c7928907298cd2f. Chain 2 (Bitcoin): anchored in block 953846 (2026-06-15T22:48:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/008fee39-fb76-49a5-8540-38bd706e47e0.json and https://artists.proofprofile.net/proofs/artist/008fee39-fb76-49a5-8540-38bd706e47e0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-15T22:48:34Z
  text: {"copyright_id":"0x40e5d296e7038056bc881feaa98d746a36f48e0895df83073c7928907298cd2f","name":"Kolja Lessing","registered_at":"2026-06-15T13:54:45Z","symbol":"NIM0728948","token_address":"0xb1c6d735cf6593dd28619c7154ae620abf3ef9bf","type":"artist","uuid":"008fee39-fb76-49a5-8540-38bd706e47e0"}