Looks fine to me. As long as 18.219.141.113 is your EHCP server, and you've added "spotiads.net" as a domain in the panel on 18.219.141.113, other domains should be able to use ns1.spotiads.net and ns2.spotiads.net as name servers.
Is this the way you've set it up? It's not working for you? What exactly are you trying to do?