user128189: How are Satoshis accounted for and transferred? As in, is it the case that when I have ownership of a particular Sat at an address, is it actually that I own sat number 241536 from BitCoin number 237518 or whatever?
Are Sats connected to a particular Coin in that manner or are they separate and just that when I have ownership of 100,000,000 Sats I can say I have the equivalent of a full bitcoin?
I realise they may seem like a supper silly question but it has been bothering me.

user208: Satoshis, or BTC, are not explicitly tracked. You cannot compute an exact history of the addresses a specific satoshi has passed through.
At a technical level, every transaction "mixes" a number of inputs (each of 0 or more satoshis) into a number of outputs (again, each of 0 or more satoshis). Typical transactions have 1 or a few inputs and 2 outputs, though any non-zero number of inputs and outputs is possible. If a transaction has exactly one input and exactly one output, you can might be able to say the satoshis "pass through", but in any other case, they get split and merged by every transaction, and you can't say which one goes where - they all go everywhere.
At best, you can compute a "history" of a transaction output, by enumerating all addresses/scripts any of of its ancestor coins have passed through. For most outputs, I imagine that a substantial portion of the entire chain's history will be included in that ancestor set, though.
Also, be aware of techniques like CoinSwap, where two parties can "swap" ownership of coins, without there being any on-chain evidence linking the two coins.

128189: <p>How are Satoshis accounted for and transferred? As in, is it the case that when I have ownership of a particular Sat at an address, is it actually that I own sat number 241536 from BitCoin number 237518 or whatever?</p>
<p>Are Sats connected to a particular Coin in that manner or are they separate and just that when I have ownership of 100,000,000 Sats I can say I have the equivalent of a full bitcoin?</p>
<p>I realise they may seem like a supper silly question but it has been bothering me.</p>
 208: <p>Satoshis, or BTC, are not explicitly tracked. You cannot compute an exact history of the addresses a specific satoshi has passed through.</p>
<p>At a technical level, every transaction &quot;mixes&quot; a number of inputs (each of 0 or more satoshis) into a number of outputs (again, each of 0 or more satoshis). Typical transactions have 1 or a few inputs and 2 outputs, though any non-zero number of inputs and outputs is possible. If a transaction has exactly one input and exactly one output, you can might be able to say the satoshis &quot;pass through&quot;, but in any other case, they get split and merged by every transaction, and you can't say which one goes where - they all go everywhere.</p>
<p>At best, you can compute a &quot;history&quot; of a transaction output, by enumerating all addresses/scripts any of of its ancestor coins have passed through. For most outputs, I imagine that a substantial portion of the entire chain's history will be included in that ancestor set, though.</p>
<p>Also, be aware of techniques like <a href="https://en.bitcoin.it/wiki/CoinSwap" rel="nofollow noreferrer">CoinSwap</a>, where two parties can &quot;swap&quot; ownership of coins, without there being any on-chain evidence linking the two coins.</p>
