WTF is a Holo? Holonym is a decentralized protocol for verifying authentication tokens that prove ownership of an account and associating them with a user's cryptographic keys. This project emerged out of a need to create a decentralized identity registry for scientists in the Web3 ecosystem. A call to action was made at DeSci@ethDenver hackathon on February 14th, 2022. Three hackathon prizes later, OpSci is proud to launch a prototype at DeSci Day during ethAmsterdam. Attendees holding this POAP will qualify for free account verification and entry into the DeSci registry and placed on an early adopters list.