William Entriken, also famously known on GitHub as fulldecent, is the main author of ERC-165 and ERC-721. ERC-721 was made famous by CryptoKitties and it is the non-fungible token (“NFT”) standard that powers other blockchain platforms such as Decentraland and OpenSea. William is the main author of the last two Ethereum Request for Comments (“ERC”) standards and is a blockchain developer who continually contributes to the Ethereum open source project. William’s main focuses are on language design and interoperability and his other interests include corporate development and security research. William plays an active and significant role with BLMP advising on technology strategy, technical design, ERC-721, and Ethereum smart contracts.