An alternative to Twitter's verified program powered by Keybase.
Proven is a browser extension that adds badges like for keybase, github, etc next to users names like Twitter's verified badge but based what accounts the user has posted proofs for Keybase. See the screenshot for what it looks like.
In addition to twitter, it adds badges on Hacker News too.
To chat about Proven, pop into the open Keybase Team for the project.