Have you pumped the bilge down as far as you can and then wet vacuumed any remaining water to completely dry it. If the weeping stops after that's done you've at least solved the source issue. Since you're in Toronto and the hard freeze zone if its coming from the keel bolts the crack may have occurred this past winter and gone unnoticed in the spring while the weight of the boat was on the keel and materialized now after a summer of the keel hanging off bolts that may have gone somewhat slack allowing water from the bilge to weep between the root and keel all summer.