How do you prove that you took it with an original camera?

This requires a very rigorous logic system to support it. First, you need photographic equipment, such as mobile phones and cameras, to take a photo. Secondly, you have to shoot in one place. Finally, you press the shutter and get a photo. There are three important points in this process. The first one is your photographic equipment. The properties of the photo will show what your photographic equipment is. If you have this equipment and have a photo record, it is very important. The second is location. If this location is your home, there is no doubt. It's written in the household registration book and ID card. If you are outside, there should be witnesses, such as your friends, family, people who know you in the surrounding environment, and people who can prove that you took pictures. The third is your actual photography skills. If you take a professional photo, the performance and attributes of the camera, as well as your own photographic knowledge and technology, can explain the possibility that this photo is taken by you. If the above three points can be satisfied, then this photo must have been taken by you.

The shooting time of this photo is unique (it can let others know exactly when it was made and will not change because of the P picture), and then develop the habit of watermarking to prevent others from taking pictures.

I hope I can help you!