You can't retroactively break the law. It's in the constitution. However, if you are using it in an ongoing thing (based on your hypothetical situation), then they may ask for you to stop.
Example. If using paint was made illegal, you could not be charged for using paint before the law existed, and any paintings made before the law would be legal. However, continuing to use paint after the law would be illegal, and any paintings made after the law would be illegal. Make sense?
Yeah but it's still stupid. Not to mention immoral. What is public domain once should stay that way, period. No one has the right to appropriate common property. It's like if I suddenly said that I own all the air and everyone has to pay me for breathing. That'd be ridiculous because air is common property and no one can claim ownership of it.
Copyright should exist during the lifetime of the creator, HOWEVER the protection granted by copyright should be significantly reduced. It should be considered that whenever a work is published publicly it should be free to be shared and copied for noncommercial uses. Copyright should only apply to commercial use.
Also nobody should be able to claim ownership on public domain works.
This has been going on for a long time. The "Happy Birthday" song written in 1893 was removed from the public domain and copywritten by Time Warner. In the US it is illegal to sing this song in public.
The really sick stuff is the pharmaceutical companies copywritting people's DNA. This is the type of tyranny not even George Orwell could imagine.
The whole system needs to be torn down before it gets any worse.
Total abuse of copyright. [link] I'm trying to wrap my head around this one and it won't...someone writes a popular song. Being popular, people like to sing it. Then those same people who gave the author of the song it's popularity and success can get arrested for doing so
Copyright is game of scoundrels, frauds, and liars.
The Mildred and Patty Hill sisters were pretty much plagiarists themselves. "The good morning to all" song they copyrighted was but a ripoff of older songs with exact same melody. "Happy Greetings to All" and "Good night to you all" published in 1858. [link]
This goes along with what Professor of law Robert Brauneis wrote, “Many question the validity of the current copyright, as the melody of the song was most likely borrowed from other popular songs of the time, and the lyrics were likely improvised by a group of five- and six-year-old children who never received any compensation.” [link]
The American court system is beyond corrupt when it comes to upholding the copyrights of liars. Another example story is the two greatest fortunes of the modern era Bill Gates and Steve Jobs were founded on piracy. The founding principle of point and click computing was invented by the Xerox corporation but they never patented it and then the thieves stole it to pass it off as their own creations which became MicroSoft and Apple. [link]
Bill Gates and Steve Jobs, kings of technology? Hell no, more like king of thieves and lord of liars. The world as we know it is not what it seems. The whole thing is just a big racket.