How many blockchains?

[GerardPerche]

Cryptocurrencies use a blockchain to store transactions history in a non-hackable way. But, with Azarus, we also have to store data about our digital assets. Some of them may have a unique ID, and we may have to store their owner's ID,and some other data.
Do we have to store everything in a single blockchain, or do we have to manage 2 of them, one for transactions in Aza coins, and a second one for digital assets ?