Point 1.
Copyright is automatically assigned to the creator of the original art in the UK. It is a legal right for 50 years. After 50 years the owner/creator has to reapply for copyright.
Neither you (the original poster/owner) or, the photographer has a right to reproduce the image for profit unless A: the original creator has signed over copyright or, B: 50 years have expired and the the owner/creator hasn't reapplied for copyright.
But, then it all comes down to money. At the end of the day the biggest pot wins.
Essentially, the theory states that only an IMAGE and not an IDEA can be copyrighted. Therefore, a photograph of an existing image is an original image. Hence all the rules about not being allowed to photograph pics in galleries etc.
However, if you had enough money to take on Corel or, any other megacorp in such a case you would probably win.
As far as the opening post goes - you do not buy the copyright when you buy an original work of art unless you buy a contract stating so. You only buy the painting/sketch/photograph/whatever. You have no right to profit from reproduction.
And, before anyone tries to say WRONG, RIGHT, WHATEVER. Fuck off - I know my stuff.