Apex domains cannot have CNAME records.
Question and response
Question
dig weezy.com.br. NS
Answer
weezy.com.br. 1 NS nick.ns.cloudflare.com.
weezy.com.br. 1 NS gwen.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
gwen.ns.cloudflare.com. 2 A 108.162.192.160
gwen.ns.cloudflare.com. 2 A 172.64.32.160
gwen.ns.cloudflare.com. 2 A 173.245.58.160
nick.ns.cloudflare.com. 2 A 108.162.193.213
nick.ns.cloudflare.com. 2 A 172.64.33.213
nick.ns.cloudflare.com. 2 A 173.245.59.213
gwen.ns.cloudflare.com. 2 AAAA 2606:4700:50:0:0:0:adf5:3aa0
gwen.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c0a0
gwen.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:20a0
nick.ns.cloudflare.com. 2 AAAA 2606:4700:58:0:0:0:adf5:3bd5
nick.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c1d5
nick.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:21d5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0