Apex domains cannot have CNAME records.
Question and response
Question
dig double-d-productions.com. NS
Answer
double-d-productions.com. 4 NS ns1.double-d-productions.com.
double-d-productions.com. 4 NS ns2.double-d-productions.com.
Authority
The response has no authority records.
Additional
ns1.double-d-productions.com. 4 A 139.99.68.240
ns2.double-d-productions.com. 4 A 51.79.234.135
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0