The Registration Authorities just like Italian SIAE or America WGA can provide legal evidence of the existence of a new artistic work at a certain date-time. Usually this registration is valid for a period of 5 years. Our timestamping service gives the possibility, through a legally valid timestamp, to prove the existence of the work at a certain date-time. The timestamp is valid for 20 years applicable to any digital document not limited to artistic field (i.e. commercial contracts, legal documents, software, etc.).