Checking Release Signatures

I'm curious which key is used to sign the release checksums for each
release, for example these:
https://www.freebsd.org/releases/13.0R/signatures/

I have looked at the release announcement, but it is not immediately clear:
https://www.freebsd.org/releases/13.0R/announce/

I checked the FAQ:
https://docs.freebsd.org/en/books/faq/#install

I looked in the handbook at the install section:
https://docs.freebsd.org/en/books/handbook/bsdinstall/

I couldn't find any hints anywhere as to which key to import or which key
to search for on a keyserver or what the fingerprint for the key should be.
I was able to work backwards from the fingerprint on one of the
signed checksums and search for it on the keyserver and see which key it is
and via WoT understand that the key is ok. Also, I recognize who the key
belongs to. Am I missing something very obvious?