When you copy the binary over, are there any additional steps you need to do. I have tried this and I seem to get a message saying that I am missing GLIBCXX_3.4.20
If you compile it on the same distro and version that you have on your droplet, it will work (make sure you also installed all dependencies). If you don't want to worry about it, see the ppa in my sig and install bitshares-cli (that's what I do).
Since there are no such thing as "official" binaries any more, the PPA is as official as you can get. They were uploaded by a delegate, the source code used to build the packages is signed with a GPG key in the debian-keyring and is inspectable on the launchpad site. The binaries built from the GPG code are signed by with the PPA key and will be verified by apt when you download and install. This is the same system bitcoin uses for distribution, as well as mozilla, libreoffice, wine, etc.