It should be trivial for them to allow you to paste your pgp public key as you would your ssh public key, then place a nice little "verified" check mark next to commits that can be validated as having been signed with one of your associated private keys.
It should be trivial for them to allow you to paste your pgp public key as you would your ssh public key, then place a nice little "verified" check mark next to commits that can be validated as having been signed with one of your associated private keys.