Restoring image of Time Machine disk
You should be able to mount the dd image.


Transfer the file to your Mac, add .dmg as file extension and open the file


or


Transfer the file to your Mac, attach and mount it with hdiutil:

hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount ~/path/to/file


and with the printed device identifier:

hdiutil mount /dev/diskXsY



Then check with tmutil destinationinfo if the now mounted backup volume is associated with the Mac. If a reassociation is necessary check the inheritbackup and associatedisk verbs in man tmutil.