Hello, @xi01 this is my opinion:

Basically those two characteristics of the time stamp; they have all logic and absolute importance.

We can see that the time stamp is part of the auditable record, when it comes to demonstrating the incidence of any human error or abuse that may have been committed.

The copyright protection is widely verifiable, since simply by looking at the creation date, you can resolve any problem, about legal authority or owner.

And as for what refers to double deposits. I must say that anywhere in the world such a failure or error can be made. Even more so the people who work in the exchanges, who have to handle a large volume of trades in a certain time.

And perhaps there may be a lapse, in which physical and mental fatigue can cause human failure, such as:

Make a double deposit into an account.

Again, it would be the time stamp, the only material that can serve as verification, before having to resort to some more complex and cumbersome method.