[crosser]

Would the following be functionally equivalent?:

- on each platform, include your pgp key id in the "bio"/"about" of your profile

- in your pgp key, include your profile URLs on each platform as an identity.

(In DNS, CERT RR exists for this purpose already.)

[karmanyaahm]

This is exactly what Keyoxide does. See my HN profile description for step 1. See my pgp key at https://keyoxide.org/4af679d0aba0ed4b07bf7b6932ca3267c8d187d... for step 2.