Canned a bunch of fruit. How to easily save seeds?

We got a bunch of apples and pears foraging from the neighbors. Besides picking through all the bits and pulling out the seeds and drying them are their other ideas for saving the seeds till next spring? Even if I didn't want to save them throwing these in the compost sounds like a bad idea. I don't yet have any animals, but I think having chickens would be a good option for the composting route.

Do some people dig a little ditch and throw a bowl of apple/pear cores in there and dig out the starts next year? Or just directly throw them in areas they would like to have trees down the road? Or...?

Permaculture is about minimal effort so I am wondering if someone else has heard of a good idea here.

I have a similar related problem with blackberries. I had the last forage harvest and have a bunch of green, moldy, overripe, etc bits leftover. My technique is to take some clippers and drag a tarp behind me as I just clip off the large bunches and bring them back to a seating area to sort them out cluster by cluster. Right now I have a box of blackberry bits by the shop I don't know what to do with... but I would like to have them removed in some areas of the land and eventually be in another area (after I get my planning done).