Stampery is described as 'Proof of ownership :' and is an app in the Bitcoin & Cryptocurrency category. There are five alternatives to Stampery for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and JSON. The best alternative is Cesium, which is both free and Open Source. Other great apps like Stampery are ZeroID (Free, Open Source), Proof of existence (Free, Open Source), OriginStamp.com (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.
Wherever data is generated, with OriginStamp you can get it automatically timestamped to prove its integrity and time of existence. This allows to document damages, contacts, videos, photos and much more. It can even be used to proof the authorship of any digital file.