Are your UTXOs split across different addresses or one address? I assume the complexity is due to different addresses. But yeah, you can still verify it. For single address, mempool.space is the way to go. For multiple addresses, you'll need a better way.
After having built a client-controlled wallet for BTC, I have to say, UTXO is both beautiful and ugly.
its multiple addresses ... so mempool is kinda of a challenge to check each one :)
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