sia://— this can be a Skylink directly referencing your web app, or a resolver skylink that can be updated to point at other skylinks. Updating a resolver skylink will propagate much faster than modifying your DNS records on the Handshake blockchain, a process which can take several hours. See Resolver Skylinks for more info.
_contenthashand a skylink for TXT records and
sia.namebase.io.as the value of an ALIAS record on the
@root or a CNAME record on your subdomain.