Apex domains cannot have CNAME records.
Question and response
Question
dig odin-syscoin.com. NS
Answer
odin-syscoin.com. 5 NS ignacio.ns.cloudflare.com.
odin-syscoin.com. 5 NS cecelia.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0