The article claims Matterium solves four big problems in commerce, including being able to know if shoes will fit before receiving them, but provides absolutely nothing to validate any of them.

https://passport.mattereum.com/mtrm.tvg.handaxe.ach.berg.220... that's an example of the verification mechanism.

Here's a more complex one: https://passport.mattereum.com/ntfa.20210319.100.alpha.001.1...

Six separate legal contracts drawn on four different providers validating different parts of the data. The warranties are legal contracts, enforceable all over the world under the New York Convention.

It's pretty tight.