Apex domains cannot have CNAME records.
Question and response
Question
dig copyleft.no. NS
Answer
copyleft.no. 5 NS dns10.copyleft.no.
copyleft.no. 5 NS dns12.copyleft.no.
copyleft.no. 5 NS dns11.copyleft.no.
Authority
The response has no authority records.
Additional
dns10.copyleft.no. 5 A 185.226.148.5
dns11.copyleft.no. 5 A 178.255.144.240
dns12.copyleft.no. 5 A 151.252.14.5
dns10.copyleft.no. 5 AAAA 2a0c:5a00:148:0:0:0:0:5
dns11.copyleft.no. 5 AAAA 2a02:20c8:1422:1:0:0:0:f0
dns12.copyleft.no. 5 AAAA 2a02:d140:1:25:0:0:0:5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0