Apex domains cannot have CNAME records.
Question and response
Question
dig worldsite.ws. NS
Answer
worldsite.ws. 5 NS ns5.ncsdi.ws.
worldsite.ws. 5 NS ns3.ncsdi.ws.
worldsite.ws. 5 NS ns2.ncsdi.ws.
worldsite.ws. 5 NS ns4.ncsdi.ws.
Authority
The response has no authority records.
Additional
ns2.ncsdi.ws. 5 A 64.70.19.89
ns3.ncsdi.ws. 5 A 64.70.78.71
ns4.ncsdi.ws. 5 A 64.70.78.81
ns5.ncsdi.ws. 5 A 64.70.19.79
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0