In a push for a lower age rating (ESRB: E for Everyone), Nintendo removed red blood effects. In Version 1.0, when Ganondorf coughs up blood at the end of the battle, it is red . In later versions, it was changed to green (often joked as "Ganon goo"). Similarly, the "Shadow Temple" features more visceral textures in 1.0.
Whether you are a speedrunner aiming to clip through the Door of Time, a historian studying the censorship of religious material, or just a curious gamer who wants to see red blood for once, the 1.0 ROM is a fascinating artifact. zelda ocarina of time ntsc 10 rom full
Happy hunting, and remember: Time is not the only thing that changes. Code does, too. In a push for a lower age rating
Generally, no.
The most famous alteration involves the Fire Temple’s background music. In the 1.0 version, the track features a chanting sample that sounds strikingly like a Muslim adhan (call to prayer). After complaints from the Islamic community, Nintendo replaced the chanting with a synthesised choir in Version 1.2. To own 1.0 is to own the game in its "controversial" audio state. Code does, too
Copyright law (specifically the DMCA in the US) prohibits downloading a ROM of a game you do not own, even if the game is 25+ years old. Nintendo is notoriously aggressive about protecting its intellectual property.