Andras Keller
type: MusicGroup
genre: chamber music
popularity: 13
followers: 145
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1ed257883f68ce3eb7557fba3d0166c30b55db49cc831f57647aca5eb9b8a544
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/21088f2b-aef8-49aa-a5db-ea48f4c661df.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/21088f2b-aef8-49aa-a5db-ea48f4c661df.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/21088f2b-aef8-49aa-a5db-ea48f4c661df
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T09:42:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1ed257883f68ce3eb7557fba3d0166c30b55db49cc831f57647aca5eb9b8a544","name":"Andras Keller","registered_at":"2026-06-14T07:54:37Z","symbol":"NIM0387716","token_address":"0x834862fc6a30e29c2b9f51e1515a665dcca89ded","type":"artist","uuid":"21088f2b-aef8-49aa-a5db-ea48f4c661df"}
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 0x1ed257883f68ce3eb7557fba3d0166c30b55db49cc831f57647aca5eb9b8a544. 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/21088f2b-aef8-49aa-a5db-ea48f4c661df.json and https://artists.proofprofile.net/proofs/artist/21088f2b-aef8-49aa-a5db-ea48f4c661df.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":"0x1ed257883f68ce3eb7557fba3d0166c30b55db49cc831f57647aca5eb9b8a544","name":"Andras Keller","registered_at":"2026-06-14T07:54:37Z","symbol":"NIM0387716","token_address":"0x834862fc6a30e29c2b9f51e1515a665dcca89ded","type":"artist","uuid":"21088f2b-aef8-49aa-a5db-ea48f4c661df"}
album: Summary, Vol. 2
  type: MusicAlbum
  date published: 2022-07-01