Global Unique Identifier

Looking through smart contracts, it appears there should be a global unique identifier for a moment in Topshot. Looking at a global identifier/link like this:

How is that UUID generated, and is it located on flow? I’m trying to have a database of all moments and be able to link directly to the marketplace listings for that specific moment.

It is generated in Top Shots backend, not on chain. As far as I know there isn’t currently an official way to get these values.