Yes, it’s not visible (which is in my opinion good), if someone strips it out (which takes a fair amount of work-copy and paste entire image into matching size file), and you’re caught, that’s a violation of the digital millennium act. Of course, you can do both (visual and embedded copyright).Now you're assuming that this process can't be automated somehow.
Are you certain that this protection is adequate enough that someone simply can't make a program that removes such copyright information?
They could just load it into a program like Bridge or a EXIF editor and delete the copyright info field.
To make a visible copyright:
1. Open an image and type your copyright text on it.
2. Select all
3. From the Layer >Align Layers to Selection menu align the text layer how you want it (bottom-left, top-right, center, etc).
4. Use Shift/Ctrl and the arrow keys to nudge it away from the far edges if needed.
5. record an action for this and it will not matter how your image is orientated, it will appear right where you set it to appear.