Turning physical things into NFTs: a repeatable, scalable process
medium.com
medium.com
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.