In Satoshi Nakamoto's diagram:
I see a Hash in each transaction block. It would be interesting to see the first block in the chain--it isn't shown. I say that because I do not see anything that references a digital coin. Presumably, if I were to go back to the original transaction block (let's assume that it's a coinbase transaction--one that received, say, 25 bitcoin from a mining effort)--is the Hash for that first transaction block simply a bitcoin address hashed with the next owner's public key? If my newbie question is too off-base, then my real question is: Where is the coin in the diagram above (I understand that coin transactions result from inputs and outputs, but to keep things simple, the "coin" I'm referring to would have only one input and one output--I am trying to track a single digital asset using the diagram above, so it's okay to abstract the "coin" into a single hash for the sake of explanation)? Is the "Hash" effectively the "coin"--and to see the original coin's address, you would need to see the first block in this transaction hash chain--is that correct?