© © © © © ©

Copywriter means a creative marketing writer, not a legal beagle, so give this the weight it deserves!

• First off you need to prove something is your idea, which is yours at a certain date:
• write and draw up everything,
• seal it in a tamperproof envelope,
• get the post office to clearly date stamp it, perhaps on the seal as well
• and mail it to yourself.
  

This is the minimum, for more much more advice:Copyright and Trademark Links.