He casted this back in November. It links out to his blog domain w his socials He’s either had his blog compromised or he’s real https://warpcast.com/vbuterin/0xade38e
I'm curious to learn if an onchain proof exists or alternatively one adding his Twitter handle after a proof or ownership in the form of authenticating to twitter API or tweeting a certain Tweet. I shouldn't be needing to search outside this platform to validate this imo