If copyright guaranteed textual accuracy, then why are there 30,000 different versions? If copyright guaranteed accuracy , then why don't the modern versions agree with each other? In fact, if some churches wanted to be very petty, they could all argue that the NIV copied from the NASB, and the NASB copied from the ESV and the ESV copied from the ASV since they all have similar story lines although each one has different readings. They could all sue each other if they wanted to and no copyright law in the world would be able to settle the differences. In fact, the plethora of versions would actually be a DEFENSE AGAINST the alleged copyright infringement. With 30,000 versions, there's no way any court could prove that the accused plagiarizer followed the plaintiff's copyrighted text.
Are the manuscripts that we have copyrighted? No? Then that is why we have a multiplicity of versions. But I would expect you to know that as anyone who just looked at the facts would know. But go ahead and try to copy the KJV and change some words and then you will see why copyrights are important. Oh wait - that's just what we're talking about. Now take the NASB and try the same thing and see how successful you are.
Where were the "copyrights" throughout the entire old testament? And what if a publisher is WRONG about the text? do they litigate? Let a court decide whether a person who corrected the error was in violation of the copyright? A copyright is only legitimate when it has the force of law behind it, which ultimately makes the government the final arbiter of what the truth is about a text, not the believer. Why do you think that the job of copying the texts was given to SCRIBES not LAWYERS?
Obviously, those who favor this copyright argument haven't thought it all the way through.
If the originals had copyrights, I wonder if we would have had the issues we have today with "onlyism".