I'm involved in a deal where an industry organization is attempting to white label my software. Their Chairperson is a lawyer, so they are cautious on the legal stuff. They want to be absolutely sure that I own all the IP. Is there a way that I can easily prove this? Here are some facts:
Typically they would just want a document admitting in writing that you in fact do own all of the IP and that should their be any IP infringement the penalty / punishment will be on you.
Assuming you wrote all of the code and any open source code you used were released under MIT or some license that allows you to write commercial software based on it without having to release your source code it sounds like you should be fine.
But if all the code, images and work is 100% your creation and IP you just need to say that in writing.
Here is now this type of situation typically rolls out:
Disclaimer: This information does not constitute legal advice and does not establish an attorney-client relationship.