Fakes exist. Some uploaders rename any 32 MB OoT ROM to appear authentic. To verify:
Ensure that your emulator has the enabled in the core settings. While the original Ocarina of Time only required the standard 4MB Jumper Pak, allocating the extra virtual memory stabilizes frame rates when rendering uncompressed assets or loading large ROM states. Modding and Romhacking Potential oot ntsc jp v10 rom 32 mb extra quality