The GPG key is missing from common keyservers
I checked with gnupg-users: https://lists.gnupg.org/pipermail/gnupg-users/2017-January/057582.html and it appears your key is not on servers like: hkp://pgp.mit.edu and hkp://pool.sks-keyservers.net If that is so, it should really be good to upload it to any of those pre-github-requiring-public-key-upload servers. Else, (again, if that is so), trying to verify tag or commit fails once a user clones your repo.
LATER NOTE: To clarify what I mean by
else ... trying to verify tag or commit fails once a user clones your repo
It may even be possible (I don' know if it is) to get your public PGP key from github, but I think it is wrong to rely on Github only for all the cryptro verifications. And the community keyservers should be the first option available to Github, as any other, users. And if I can't get the key from those, this is what happens:
/where-I-cloned-it/decentraleyes $ git verify-commit 560b68932c524736e2b4861fb335966b4262ff90
gpg: Signature made Fri 27 Jan 2017 13:41:09 CET
gpg: using RSA key CECC45E1E979013C
gpg: Can't check signature: No public key
/where-I-cloned-it/decentraleyes $
LATER NOTE END.
Regards!