Having Our Company Name As The Registrar

Ive done a few whois searches on some of our competitors websites. In the registrar details it has our competitors name as the Registrar and as the nameservers. How can we do this? so for example if someone did a whois on our clients websites, they would see something like this:

Registrar:
OurCompany Ltd [Tag = OurCompany]

Name servers:
ns1.OurCompany.co.uk
ns2.OurCompany.co.uk

Do we need our own nameservers and dedicated server? We've just bought an account with openSRS so we buy our domains through them (if that makes a difference).