UTXO ownership and location

You do not own an Atomical at an address. You own it because you control the private key for the script of one specific unspent output, and that output currently carries the object.

Why the distinction matters

Statement	True?
This address holds 5000 units	A convenience sum, not a stored fact
This outpoint carries 5000 units	The actual fact a validator records
Moving BTC from this address is safe	Only if the spent outputs are cardinal
Consolidating my UTXOs is harmless	No. Consolidation is an allocation event

An ordinary wallet sees satoshis. It will happily select a coloured output to pay a fee, split it into change, or sweep it into one consolidated output. Every one of those is an Atomicals operation whether you meant it or not.

The three states of an output

Coloured. A validator recognises Atomicals value at this outpoint. Spending it moves or destroys that value.

Cardinal. Ordinary bitcoin. Safe to spend for fees.

Unknown. Your data source has not caught up, is unavailable, or does not index the relevant asset type. Treat unknown as coloured until proven otherwise.

Multiple Atomicals at one output

An output can carry more than one Atomical. That happens after a consolidation, or when a mint places several objects together. Separating them is a deliberate operation, not a side effect of an ordinary spend.

For non-fungible objects that separation is the x splat operation. See splat and mixed outputs.

What to do about it

1. Ask your data source for outpoints, not address totals.
2. Keep coloured outputs in a wallet that can freeze or exclude them.
3. Keep a dedicated pool of cardinal outputs for fees. See protect coloured outputs.
4. Before signing, confirm each input’s state individually.