DAS is a decentralized, open-sourced and highly-compatible account system based on blockchains, in contrast to those centralized account systems such as cell phone numbers/email addresses/social accounts. It is the first cross-chain account system with the user of an account having full control and ownership of the account. DAS can be used as a digital assets collection account, and as an account for accessing general Internet services.
You can add multiple addresses from different chains to your COCH records, so that when others need to transfer digital assets to you, they can simply enter your COCH account instead of the complicated address. You can even label the addresses to distinguish them.