Ask HN: Keybase Alternatives?
You can do the PGP part in a decentralized way with notations and proof-specific posts - including HN:
<a href="https://metacode.biz/openpgp/proofs" rel="nofollow">https://metacode.biz/openpgp/proofs</a><p>And then there is WKD if you have a hosted site:
<a href="https://metacode.biz/openpgp/web-key-directory" rel="nofollow">https://metacode.biz/openpgp/web-key-directory</a>