For help, how do the photo organizers who participated in the photo contest know whether they took it themselves or copied it? How to prove that the photo was taken by myself?

Because you shoot better than others, jealousy makes him suspect that you are not your own picture. Now that the original logo is based on the source file and EXIF information, you can add your own exclusive logo. . . All my photos have their own LOGO, so it is important to keep the original photos (that is, photos before PS). With this, I can prove that I am original. Interested in private chat, also a photographer, is also participating in the competition.