I hooked a cable years ago and was able to get free in a similar manner, a piece of line to hold the cable while I lowered the anchor.
Another time I hooked a piece of machinery that made my windlass work very hard. Got it up, moved over close to shore so no one else would likely find it and beat it off with my hatchet. Luckily there was a thin spot where the anchor had lifted the prize so it broke free after a few whacks.
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