Dear Customer ,
Thank you for posting your intellectual property law question today. Your notecards and prints are covered under copyright law. So once you created you are attributed automatic protection under US copyright law. It is also possible to register your work with the US copyright office; this would entitle you to statutory damages in case of a future infringement.
It is possible to register a group of works under one registration.
There is no law preventing you from using your business name as a website domain name so long as the domain name is free; you are entitled to register under that domain name of your business.
If you would like to trademark your business protects for further protection you can do this through the USPTO.
You can apply here through the trademark electronic application system:
Please follow up with me if you need more information.
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