Apex domains cannot have CNAME records.
Question and response
Question
dig volcanoartists.com. NS
Answer
volcanoartists.com. 5 NS ns-867.awsdns-44.net.
volcanoartists.com. 5 NS ns-136.awsdns-17.com.
volcanoartists.com. 5 NS ns-1220.awsdns-24.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0