Well, www.otca.com.au has an IP address of 116.90.51.186, and pinging gets returns from vmcp97.digitalpacific.com.au. I didn't think to check what it was like yesterday.

While it does seem to have happened quite quickly, it can be done quickly, and this does seem to be where you wanted the domain to be hosted.

Still, if it seems to be too good to be true... Now would be the time to do some checking.