Jeff Lankov
type: MusicGroup
genre: choral
genre: ragtime
popularity: 3
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x555e7a1e088bc8292bd30d4586fc2d9d13e4937954f34a97871cd31054eac01a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a52ce33d-0050-4ea2-b24e-450bf60512f2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a52ce33d-0050-4ea2-b24e-450bf60512f2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a52ce33d-0050-4ea2-b24e-450bf60512f2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x555e7a1e088bc8292bd30d4586fc2d9d13e4937954f34a97871cd31054eac01a","name":"Jeff Lankov","registered_at":"2026-06-20T07:23:43Z","symbol":"NIM1552343","token_address":"0x67dfafc3a45bf8874fa76c4de5c20b7c9267adf0","type":"artist","uuid":"a52ce33d-0050-4ea2-b24e-450bf60512f2"}
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 0x555e7a1e088bc8292bd30d4586fc2d9d13e4937954f34a97871cd31054eac01a. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a52ce33d-0050-4ea2-b24e-450bf60512f2.json and https://artists.proofprofile.net/proofs/artist/a52ce33d-0050-4ea2-b24e-450bf60512f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x555e7a1e088bc8292bd30d4586fc2d9d13e4937954f34a97871cd31054eac01a","name":"Jeff Lankov","registered_at":"2026-06-20T07:23:43Z","symbol":"NIM1552343","token_address":"0x67dfafc3a45bf8874fa76c4de5c20b7c9267adf0","type":"artist","uuid":"a52ce33d-0050-4ea2-b24e-450bf60512f2"}
album: The Piano Music of George Gershwin
  type: MusicAlbum
  date published: 2008-01-01
album: Adios Nonino (Live)
  type: MusicAlbum
  date published: 2012-03-01
album: Finnissy: "Swanee" from Gershwin Arrangements (Live)
  type: MusicAlbum
  date published: 2012-03-26
album: Finnissy: "I'd Rather Charleston" from More Gershwin (Live)
  type: MusicAlbum
  date published: 2012-03-26
album: Embraceable You from Gershwin Arrangements (live)
  type: MusicAlbum
  date published: 2012-03-26
album: Messiaen: Cantéyodjayâ (Live)
  type: MusicAlbum
  date published: 2012-04-20