Here you go. No need for Keybase.
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2
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bCk=
=W7Zd
-----END PGP PUBLIC KEY BLOCK-----
And a public key alone proves what exactly? Nothing!
Keybase verifies your account on different platforms and also lets you verify other people. That's what makes it good - it really adds alot of cost for scammers to fake something like that.
A public key can be created in a few seconds, that's no biggie. It's about the trust network!!