Apex domains cannot have CNAME records.
Question and response
Question
dig eticket.gov.do. NS
Answer
eticket.gov.do. 5 NS sneh.ns.cloudflare.com.
eticket.gov.do. 5 NS colin.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0