Re: publish from certain commit onward, keeping earlier history private, but provable

>Hi,
>
>I've been hacking away on a library for quite some time and have a lot 
>of commits in my private repository:
>
>A -> B -> C -> D -> E
>
>Finally, I'm nearing completion of a first version, and want to publish 
>it to a remote called public from D onward keeping A..C to myself, so 
>public should afterwards look like this:
>
>D -> E
>
>My main motivation is that i don't really want to put ridiculously 
>first trials online, but still (on demand) I'd like to be able to prove 
>how i arrived at D (think of copyright claims, etc).
>
>As (at the moment) it's pretty much impossible to reverse-engineer the 
>hashes of commits in the chain with times and changesets, i thought 
>just keeping D's parent pointer to C would be one of the genius 
>advantages of git. Sadly i can't find a way to actually make this work.
>
>Can i somehow push D -> E to public making it a fully functional public 
>repository with all the necessary objects included to checkout D or E 
>and D still pointing to C as parent? If not, why is that?
>