I'm having trouble verifying the PGP signature on a download of the Linux CLI tools. This is a fresh Ubuntu 20.04 system on AWS, using the official AWS images for Ubuntu from Canonical. I'm using the instructions from https://support.1password.com/command-line-getting-started/ I have no idea how PGP works, so I can't debug this imagine. I imagine that the documentation has to be updated to mention whatever is causing this issue, since having the instructions fail out of the box on a system as common as Ubuntu feels like a major error work addressing. I imagine the commands in the docs worked out of the box in the past, but perhaps something changed on Ubuntu 20.04 to make them not work anymore.
op op.sig op_linux_amd64_v1.3.0.zip
$ gpg --receive-keys 3FEF9748469ADBE15DA7CA80AC2D62742012EA22
gpg: key AC2D62742012EA22: new key but contains no user ID - skipped
gpg: Total number processed: 1
gpg: w/o user IDs: 1
$ gpg --verify op.sig
gpg: assuming signed data in 'op'
gpg: Signature made Fri Jul 17 16:33:21 2020 UTC
gpg: using RSA key 3FEF9748469ADBE15DA7CA80AC2D62742012EA22
gpg: Can't check signature: No public key
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Ubuntu 20.04
Sync Type: Not Provided