Apex domains cannot have CNAME records.
Question and response
Question
dig titandc.io. NS
Answer
titandc.io. 5 NS ns2.titandc.io.
titandc.io. 5 NS ns1.titandc.io.
Authority
The response has no authority records.
Additional
ns1.titandc.io. 5 A 185.63.172.131
ns2.titandc.io. 5 A 185.63.173.2
ns1.titandc.io. 5 AAAA 2a04:f600:4454:48:8000:1856:3172:131
ns2.titandc.io. 5 AAAA 2a04:f600:4454:48:8000:1856:3173:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0