1。 Qualitative problem: If the cartoon image designed has remarkable creativity and novelty, it will be protected by intellectual property rights. Copyright registration is not needed for copyright protection. In other words, the copyright of a work can be protected by law without registration, provided that you can prove that you are the original creator of the work.
2。 Precautionary measures: keep some evidence enough to prove the originality of the work. Such as original drawings, manuscripts, drafts, originals published in various media for the first time, etc.
3。 Infringement: If infringement is found, just file a lawsuit.