This YouTube clip from Charles was released about 3 months ago, but does a great job explaining the approach to interoperability between chains, tokens, and native assets on the Cardano blockchain. This links back to the previous post on Open Source which touches on tokens.
It explains how NiPoPoWs (Non-Interactive Proofs of Proof-of-Work) will be used.
Non-Interactive Proofs of Proof-of-Work (NIPoPoWs) are short stand-alone strings that a computer program can inspect to verify that an event happened on a proof-of-work-based blockchain without connecting to the blockchain network and without downloading all block headers. For example, these proofs can illustrate that a cryptocurrency payment was made.
https://nipopows.com
Along the way there’s a great overview of how the crypto space evolved with Bitcoin, Ethereum and Cardano (Generation 1, 2 and 3) and their respective capabilities.