Translations:How-to verify GPG key of official .ISO images/5/en
From Manjaro
Download all keys from the Manjaro Developers from GitLab:
wget gitlab.manjaro.org/packages/core/manjaro-keyring/-/raw/master/manjaro.gpg
Next, import all the keys in the downloaded .gpg file into your gnupg keyring:
gpg --import manjaro.gpg