For nm.debian.org, at 2022-02-13:
For the past 1.5 months, I have worked with Felix Zielcke on pcmemtest.
For this past work, Felix Zielcke sent mails using the email address firstname.lastname@example.org
which is the one they're using on nm.debian.org, and they signed their work and
email using a GPG key with fingerprint 2D68 5DD4 E0BB BD52 02B9 1777 B76D B9FF F0B6 BF1F.
I've made sure that they are able to decrypt encrypted messages sent to this key
and that they're able to sign messages with the same key.
Due to the interactions we had, I'm convinced that Felix Zielcke as they
present themselves on nm.debian.org is the rightful owner of both email
email@example.com and GPG key 2D68 5DD4 E0BB BD52 02B9 1777 B76D B9FF F0B6 BF1F.