Bitquery Scan Finds 96,000 Fake-Address Outputs in Bitcoin's UTXO Set
Blockchain analytics firm Bitquery identified 96,000 outputs that clutter Bitcoin's unspent transaction database, increasing node costs.
Blockchain analytics firm Bitquery has published the results of a scan that identified 96,000 fake-address outputs currently residing in Bitcoin's unspent transaction output (UTXO) database. These outputs are not standard transactions but appear to be deliberately crafted entries that bloat the ledger.
The scan highlights a recurring pattern: users embedding arbitrary text or data into addresses rather than using OP_RETURN, a more standard method for storing data on-chain. Unlike OP_RETURN outputs, which are provably unspendable and can be pruned, fake-address outputs resemble ordinary UTXOs and must be retained by nodes indefinitely.
Cost imbalance for node operators
Bitquery notes that the two data-embedding methods impose radically different costs on Bitcoin nodes. Cheap OP_RETURN repetition can be handled more efficiently, while fake-address text increases the size of the UTXO set and forces every full node to store and process the clutter permanently.
- The scan found 96,000 fake-address outputs in Bitcoin's UTXO database.
- Fake-address outputs are harder for nodes to prune than OP_RETURN data.
- Bitquery says the extra data contributes to node resource usage and network inefficiency.
The finding underscores an ongoing debate about Bitcoin's scalability and the limits of its on-chain data capacity. While the bulk of Bitcoin usage remains legitimate transactions, the presence of junk outputs raises operational concerns for node operators who must maintain the full ledger.