Apex domains cannot have CNAME records.
Question and response
Question
dig pintopinta.com. NS
Answer
pintopinta.com. 5 NS ns-422.awsdns-52.com.
pintopinta.com. 5 NS ns-1281.awsdns-32.org.
pintopinta.com. 5 NS ns-160.awsdns-20.com.
pintopinta.com. 5 NS ns-412.awsdns-51.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0