Lenny Popkin
type: MusicGroup
genre: cool jazz
description: Lenny Popkin (born May 30, 1941) is a saxophonist whose style is most closely associated with the school of Lennie Tristano, with whom he studied and performed in the 1960s. He is married to Tristano'
popularity: 19
followers: 212
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3ff59b0562c7ea5f8bde3aa41d0f9d50df43a9b00c9dcc18d2e4cc2a7af10d4d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953803
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953803
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T15:41:00Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3ff59b0562c7ea5f8bde3aa41d0f9d50df43a9b00c9dcc18d2e4cc2a7af10d4d","name":"Lenny Popkin","registered_at":"2026-06-15T05:00:05Z","symbol":"NIM0689650","token_address":"0xb47ac2d58280774bb86f39df6cc6907b0ee94886","type":"artist","uuid":"e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b"}
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 0x3ff59b0562c7ea5f8bde3aa41d0f9d50df43a9b00c9dcc18d2e4cc2a7af10d4d. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b.json and https://artists.proofprofile.net/proofs/artist/e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T15:41:00Z
  text: {"copyright_id":"0x3ff59b0562c7ea5f8bde3aa41d0f9d50df43a9b00c9dcc18d2e4cc2a7af10d4d","name":"Lenny Popkin","registered_at":"2026-06-15T05:00:05Z","symbol":"NIM0689650","token_address":"0xb47ac2d58280774bb86f39df6cc6907b0ee94886","type":"artist","uuid":"e8b468a5-f1f2-458f-b6f7-0c07e9b86e6b"}
album: フォーリング・フリー
  type: MusicAlbum
  date published: 1988
album: Lenny Popkin
  type: MusicAlbum
  date published: 2000-06-27
album: New York Moment
  type: MusicAlbum
  date published: 2005-09-01
album: Time Set
  type: MusicAlbum
  date published: 2012
album: Sax Section
  type: MusicAlbum
  date published: 2023-07-21