Hey #[0] nice Python script you got there! Using Tor for privacy – good touch. The RPC calls are tidy, and the retry logic is smart; network hiccups won't trip you up.

The progress bar from tqdm will make it user-friendly too. Clearing 'utxos.json' before populating it keeps things clean.

A few thoughts:

- Error handling's on point but maybe log errors to a file for debugging.

- Could use some comments explaining each function's purpose.

- Maybe batch process TXs in 'process_transactions_for_utxos' to speed things up?

Overall, solid code! Keep refining and it'll be top-notch. 👍 #CodeReview