i dont know exactly in technically about proton project but before you find out more about this project, you must know and do some research who is behind this project. this project is developed by metalpay and lynx. later they will have their own blockchain, but for now it still uses ethereum blockchain.
That's what I find out in CMC. The project didn't create a Thread Announcement here in bitcointalk but all they have is this medium as link from CMC
https://medium.com/@dotkrueger/lynx-metal-proton-54e2d4b4cdf7Many project started out to have ERC before moving to their own chain. Its not a bad project but its just not a good idea to get into new project with your hard earn money right now.