Mr. Len
type: MusicGroup
genre: underground hip hop
description: Mr. Len (Leonard "Lenny" Smythe) is a hip-hop DJ born in the Bronx, New York. He moved to Hillside, NJ when he was 12 years old. He was a member, with Bigg Jus and El-P, of the underground hip-hop tri
popularity: 6
followers: 1040
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4296bb7eb39c1c70d039fa9f1f0b445c724be7243cb13bac24ed4607333e50b3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954555
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954555
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ae25dc1d-5fb9-473a-8320-630237837309.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ae25dc1d-5fb9-473a-8320-630237837309.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ae25dc1d-5fb9-473a-8320-630237837309
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T12:10:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4296bb7eb39c1c70d039fa9f1f0b445c724be7243cb13bac24ed4607333e50b3","name":"Mr. Len","registered_at":"2026-06-20T10:46:59Z","symbol":"NIM1595961","token_address":"0x0dbcf993889f2c4a36d0a7152f143fc983755085","type":"artist","uuid":"ae25dc1d-5fb9-473a-8320-630237837309"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4296bb7eb39c1c70d039fa9f1f0b445c724be7243cb13bac24ed4607333e50b3. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae25dc1d-5fb9-473a-8320-630237837309.json and https://artists.proofprofile.net/proofs/artist/ae25dc1d-5fb9-473a-8320-630237837309.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T12:10:20Z
  text: {"copyright_id":"0x4296bb7eb39c1c70d039fa9f1f0b445c724be7243cb13bac24ed4607333e50b3","name":"Mr. Len","registered_at":"2026-06-20T10:46:59Z","symbol":"NIM1595961","token_address":"0x0dbcf993889f2c4a36d0a7152f143fc983755085","type":"artist","uuid":"ae25dc1d-5fb9-473a-8320-630237837309"}
album: Pity the Fool
  type: MusicAlbum
  date published: 2001-10-23
album: Pity the Fool
  type: MusicAlbum
  date published: 2001-10-23
album: Pity The Fool: Experiments In Therapy Behind The Mask Of Music While Handing Out Dummy Smacks
  type: MusicAlbum
  date published: 2001-10-23
album: The Marvels of Yestermorrow
  type: MusicAlbum
  date published: 2013-08-05
album: The Marvels of Yestermorrow
  type: MusicAlbum
  date published: 2013-08-05
album: My Final Underground Song
  type: MusicAlbum
  date published: 2015-01-27