Apex domains cannot have CNAME records.
Question and response
Question
dig cc-bm.net. NS
Answer
cc-bm.net. 5 NS ns-541.awsdns-03.net.
cc-bm.net. 5 NS ns-196.awsdns-24.com.
cc-bm.net. 5 NS ns-1882.awsdns-43.co.uk.
cc-bm.net. 5 NS ns-1190.awsdns-20.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0