For those curious, the new Twtxt <-> ActivityPub bridge I'm building (bidirectional) simply requires three things:

1. You register your Twtxt feed to the bridge: https://bridge.twtxt.net
2. You verify that you in fact own/control the feed by putting the verification code somewhere on/in your feed (doesn't matter where or how)
3. You proxy/forward requests for /.well-known/webfinger to the Bridge bridge.twtxt.net.

I'm still testing through and ironing out bugs 🐛 Please be patient! 🙏