HEISENPEPE is Series 2, Card 5 of the iconic Rare Pepe Wallet set. This legendary collection of NFTs was minted on Counterparty (XCP) from 2016-18, long before the barrage of normie NFTs we see today. Many Counterparty wallets have been lost over the years, thus circulation is far lower than the 999 issuance minus 222 burned:
https://xchain.io/asset/HEISENPEPE
Counterparty assets live in the OP_RETURN section of the Bitcoin blockchain and are traded via the XCP Dex. RAREPEPEDEALER does the hard part for you, acquiring the assets and wrapping them in emblem.finance vaults. Verify the asset is in this vault by clicking the link in the description.
MOAR PEPEs: https://opensea.io/RAREPEPEDEAL...