If you used any external sources for your products, you must disclose the source.
You will be responsible for any issues that arise due to incorrect copyright notation. Please make sure to record them in detail.
Please make sure to thoroughly review the copyright training materials 
Familiarize with copyright rules
Familiarize with copyright rules Products in the Asset category may not use AI or real trademarks.
You cannot sell any products that contain AI images or existing logos/trademarks, even if you list the sources!
If you created all the source code yourself
If you created all the content in this Product yourself without using any external sources,
select Yes.
(If you select “Yes,” there is no additional Copyright field.)
If you used an external source
Please cite the source of all materials you did not create yourself, such as 3D models, images, textures, and fonts. This includes all external sources, such as public domain masterpieces or free images suitable for commercial use (CC0) obtained from free image websites.
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If any of the Product's source code uses external sources,
select No.
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Please select the relevant section and cite the source based on the type of external source used.
Please be careful to not perform any copyright violations!
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According to the recommendations published by the Korea Cartoonists' Association, you may commercially utilize models that were approved for filling in spaces or being used as references. However, you must specify when you are utilizing an external source.
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You may not use another author's model without altering it, or use more than 60% of the original product.
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You may not upload a product that is a PNG image of another artist's brush material.
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You may not upload a product that is an exact copy of another website's model.
If a copyrighted product is used without authorization, all resulting issues and responsibilities lie with the seller.