The copyright on a work arises from the moment of its creation, without the necessity of any formalities (art. 6 Copyright Law). The timestamp  of has a probative value, in the sense that it gives a certain date with legal value for the work. In the eventuality of a possible plagiarism of the work by a third party, which is said to be the author thereof, it will be easier to prove that the work had already been created previously in that particular author’s date. So, from a legal point of view, that it is not the deposit of the work to attribute paternity..