It turns out content 'piracy' has been a battleground for centuries. And many of the prophylactic solutions remain the same. Here's one an ad for protective copyright services, from 1906.
Frunobulax Tuesday, August 28, 2012
Doesn't wormelle mean "little worm." How appropriate.
Companies that say they provide additional copyright protection for your work or will make you rich from your copyrightable work are still around today and most are still little worms preying on people who don't know better.