Hi,
You should just be able to include the meta tag they give you into the 'HEAD' section of your page, or I think the other option is just upload a file that they give you, to the main folder. Using an ftp program or whatever 'control' panel the company that you use for hosting you site gives you.
I presume you have your own web site? or are you talking about the 'artistwebsites' web site... you wont be able to do it for that site, as you dont actually 'own' it.