I see that the ISO images are signed. I've tried to fetch the signing
key[1] again,

$ gpg --keyserver keys.gnupg.net \
--recv-key E032601B7CA10BC3EA53FA81BB23C00C61FC752C

$ gpg --keyserver keys.gnupg.net \
--recv-key BB23C00C61FC752C

$ gpg --keyserver keys.gnupg.net \
--search-keys BB23C00C61FC752C

but get an error instead with each of the above methods:

gpg: keyserver receive failed: Server indicated a failure

What is the current / correct location to find the public key to check
the releases with?

/Lars

[1] https://www.devuan.org/os/keyring