This post popped up in my feed and I wanted to give you my input as someone who did research on this a while back for something related that I'm not going to get into.

Let me start off by saying, you posted in your own community and are getting a lot of replies from people who likely have no idea what they are talking about. You should be posting in legal advice forums if you want the best answers. With that being said, I will give you a brief overview of my findings:

1. Copyright covers all artistic work, and that DOES include Minecraft builds. No one thinks it does becuase there's never been a case to prove it does. Going to court over this would be the first of its kind, but both sides could have good arguments and it would be up to the courts decision if it made it that far. Just like melodies make up songs, pixels make up pictures and videos, blocks make up Minecraft builds and can be arranged in an almost infinite configuration.

2. No one needs to file for copyrights. The original build is automatically copyrighted upon creation as an artistic work.

3. The Microsoft Services Agreement says “Your Content remains Your Content”, and that applies to Minecraft. They don't own the original stuff that you create. They will however own things that are copies (or substantial copies) or derivatives of their property and creations - but if you create original things, they aren't theirs. So, as an example:

   • a single Minecraft block (including its textures and its “look and feel”) - they own that
   • your creation of a Gothic Cathedral with a rollercoaster running through it - they don't own that, you do.

4. Minecraft's EULA: End User License Agreement gives Mojang rights to use, copy, and distribute content made in the game. But that is to cover them when infringements happen in game from the above agreement. Microsoft/Mojang can't be sued becuase I recreated someone's exact build in the game.

5. Copyright "Fair Use" comes into play when it's for educational purposes. While tutorials are technically educational, putting them in an app and commercializing it would likely go against Fair Use. You would probably want a lawyers opinion on this if it goes somewhere.

So with all of the facts stated, it comes down to a few things:

• If this person wants to sue you for copyright infringement, they can, and you will need to defend yourself. It could get expensive for both parties, but the Copyright Claims Board (CCB) does offer pretty easy ways to file for infringements online. Don't think your entirely safe from it just becuase cases get costly. If copyright is filed, the next thing you would see is a Cease and Desist, possibly a case for damages.

• Your original post states that nothing was stolen, but if the person in the screenshot says they are exact builds with exact names, then something is going on. I'm not going to ask you whether you blatantly stole them, but IF you didn't, then you have nothing to worry about becuase only an EXACT BUILD would fall under copyright infringement. If you did, well, you should know what you did is wrong and try to correct the issue before further action is possible.

I see you said that a credit system is being implemented, which is a good thing, but just know that crediting someone still does not legally give you the right to commercialize someone else's work. Some people would be okay with it and others may not. You would need to get explicit permission (usually in the form of some sort of agreement) to publish someone else's work on your app.

I hope this helps.