I've been playing with Gavin's "bitcointools" ( again) to track what happened to the famous "pizza" Bitcoins. It is however possible to track money flows between addresses, which may “dilute” into other flows, as illustrated in this answer. It might be a grouping of smaller amounts in the same place (wallet), or at the same address, or in the same transaction, but at a given point in time.) An individual bitcoin is not well defined. (And it's the same, or even worse, for bitcoins. Could you tell where each of the satoshis in * came from? A or B? Just impossible.Ĭonclusion: There is no such thing as individual satoshis, they don't have identities in the Bitcoin framework. Only global amounts are involved, not individual satoshis. tx3: (input on D: 25BTC, input on E: 25BTC output on *: 50BTC).tx2: (input on B: 50BTC output on E: 25BTC, output on F: 25BTC).tx1: (input on A: 50BTC output on D: 25BTC, output on C: 25BTC).There are three transactions here, and they mention only values: those transactions are stored in the block chain like: Here is a possible schema describing transactions from two addresses A and B that contain initially 50 BTC each: (A) 50 btc -tx1-> 25 btc (C)