well i guess it depends from country to country.
here in germany you can of course make a real company from your business, saving your logo etc....
But never forget, everything you make is your property. No one has the right, to take it away just because you don´t have a sheet or something that proves that.
In reality it will be really really hard to save it completely. There are countries on this world, which give a fu** on something like internet rights and if people who are located there steal your stuff, you can´t really do anything against it. It won´t be easy to attack someone from Cayman island with a lawyer you know
The only thing you can do is brand yourself. Make your name so trustworthy and visible as possible, so that people recognize that you are the dude with the skills, who did all the great stuff.