When I got married I put an ad on Craigslist seeking a photographer willing to do "work for hire" so that I would have the copyright. This is how photographers hire other photographers (e.g. for multi photographer shoots). I got many more responses along the lines of "how dare you ask for work-for-hire" than actual offers.

I had to spell out explicitly to the photographer that I hired that only I would own the copyrights to the photos and they she could not use them on her website, etc.

This was a few years ago. I think it's more common today for people to include the digital copies in the price or sell them to you for an additional fee.