If they were sealed there would be no oxygen so could the bacteria grow in such oxygen limited environment.
The most dangerous of bacteria thrive in low/no oxygen environments. In fact C. Botulinum, being an obligate anaerobe, NEEDS and thrives in a no oxygen environment.
If the chops still had ice on them, or still felt very cold, then they were probably safe. If they were completely thawed or felt warm at all, then it was probably best to throw them away.
I do a lot of pressure canning/preserving, and rule #1 , #2 and #3 is, when opening the sealed lid is to listen for the pffft of air being sucked into the jar/can which tells there is a vacuum, and then visibly inspect the underside of the lid for black growth or mold. #1 if the vacuum was lost, it's a perfect environment for C Botulinum. Toss it. #2 mold present? It's contaminated. Toss it. #3 smell it for "off" aromas. If it smells "off". Toss it.
Years ago, in the 1970's I think, one of the Salmon canneries in Alaska, had something go wrong in their canning process, and sent out a whole shipment of improperly processed canned salmon. Numerous people died from Botulism from that shipment. In turn, that almost killed the canned salmon industry.