The hack page has checksums for the ROM with which it is supposed to be used, though that information isn't always accurate.
Have you tried adding a header to your ROM, or removing the header if it already has one? That's usually the problem when it comes to SNES hacks.
No, I have not tried that, and I'm not sure what tool to use. The "I have an SNES patch and it doesn't work" FAQ says to use something called NSRT to check the ROM, but the link supplied is faulty. Trying to use it triggered uBlock warnings, disabling the blocking temporarily and clicking it just serves up random commercial websites, and trying to go to the link location directly brings up a domain placeholder page.
The hack page does mention "NOINTRO" after the source ROM filename. Does that mean anything? Like, do I need a separate hack that removes the game's intro sequence? If so, it's not in Romhacking.net's collection of LttP hacks.
I did also see that the ROM filename is different from the ROM I have - including the file extension. Does renaming .sfc to .smc work, or does it corrupt the file?
EDIT: I have tested changing the file extension. It does not corrupt the ROM, but it also did not help the patch work.
Using TUSH (perhaps the FAQ should link to that instead?) to add a header did
work, however. I'm going to leave a review for the hack that notes that a header is necessary, and to use TUSH to check since the FAQ information is out of date.
Next question: What other
hacks are compatible with this hack?