OriginStamp.com is described as 'Wherever data is generated, with OriginStamp you can get it automatically timestamped to prove its integrity and time of existence' and is an app in the Bitcoin & Cryptocurrency category. There are three alternatives to OriginStamp.com for a variety of platforms, including Linux, Mac, Online / Web-based, Windows and Python. The best alternative is Proof of existence, which is both free and Open Source. Other great apps like OriginStamp.com are Stampery (Free) and Woleet (Paid).
Allows to certify a document ( of any format ? ), it gives a fingerprint relative to the date of the certification and it is stored in an online "Bitcoin blockchain". It can also verify the integrity of a document.
Proof of ownership : Certify that a file or email is authored by you. Proof of existence : Certify that a file or email existed at a certain point of time. Proof of integrity : Certify that a file or email was not tampered with.