@TheFuzzStone glad I'm not using either #zoom or #keybase
@yarmo, As I provide escrow services for the Russian/Ukrainian part of the #crypto community, there are many scammers who pretend to be me in order to steal money from people, so I always encourage everyone to request a #PGP signature for some message to make sure it's me. 99.999% of people don't want to deal with PGP, install additional software, import my PGP key, etc.
In this case people need only to copy-paste my signed message here and press "Verify" button:
Have a look at opmsg https://github.com/stealth/opmsg I have checked it a few times but never really found an usage scenario for it :) What you describe sounds just like a perfect match, although obviously the usability factor might be a problem again...
@kravietz, Thank you, but I can tell you that's not an option, because it's a lot of mess, as opposed to a ready-made copy-paste solution.