How do I verify the GPG sig for Litecoin Core? Usually I am able to verify signatures using the verify option in GPG, but this doesn't work when attempting to verify the Litecoin Core client DMG.

For example:

$ gpg --verify litecoin-0.14.2-osx.dmg.asc litecoin-0.14.2-osx.dmg
gpg: Signature made Mon Jul 31 14:44:45 2017 PDT
gpg:                using RSA key FE3348877809386C
gpg: Can't check signature: No public key


I am using the GPG 2.2.3 install from Homebrew.
Here is what I did to get this to work

Copy the public key (found here) to a file. I called it litecoin.public.key.

Then run the following commands:

gpg --import litecoin.public.key
gpg --verify litecoin-0.14.2-osx.dmg.asc litecoin-0.14.2-osx.dmg


This is the output that I got

gpg: Signature made Mon Jul 31 17:44:45 2017 EDT
gpg:                using RSA key FE3348877809386C
gpg: Good signature from "Adrian Gallagher &lt;thrasher@addictionsoftware.com&gt;" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 59CA F0E9 6F23 F537 4794  5FD4 FE33 4887 7809 386C