Weight wise it looks feasible. The hard part is getting something capable of transferring hundreds of tons that can also conform to hulls of different shapes.
If weight is ok, just put a lock on a rail: so boat enters the lock, two gates close behind it, the lock (and one gate) moves via a rail to the other side, reverse at the other ocean.
Maybe suspend the ship from dozens of points.
I’d imagine you could weld hooks all around the hull.