There is bunch of systems implementing things like this, commonly referred to as "content-addressable storage" as the address of the content is based on the con

There is bunch of systems implementing things like this, commonly referred to as "content-addressable storage" as the address of the content is based on the content itself. See https://en.wikipedia.org/wiki/Content-addressable_storage https://en.wikipedia.org/wiki/Content-addressable_storage