>
But doesn't the data or picture have to reside somewhere for the hash to 
take you there?
<

Well sure. But I don't think that the hash "takes you there." I think it's 
more like a code that validates when & by whom the data was created and 
(maybe)  the content. So everyone is standing around in a circle, and all 
the people in the circle don't have the object, but all the people in the 
circle have the means, if called upon, to validate what the object is, who 
created it, and when it was created. I think.

As I said, I don't have a complete understanding. So I'm probably not the 
best person to be trying to explain all of this to others. 

Gary



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