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Then you can close your existing KYC-associated channel and the only real onchain footprint is john doe opened a lightning channel, spent the sats (to where we don't know), and closed the channel

The problem here is still that you accociated your whole lightning node with those kyc coins. So it is quite clear that all the other utxos related to this node belong to you. When you close the channels only your channel partner knows how much funds you got.
So on-chain you basically doxxed all the utxos related to your node to those who know your kyc coins. How big of a problem this is, is for you to decide.

20 sats \ 1 reply \ @anon 2 Jul

"So on-chain you basically doxxed all the utxos related to your node to those who know your kyc coins."

So Basically, I doxxed myself to the exchange where I required the KYC sats from and the node operator that I opened the KYC sats with? is this correct?

The KYC sats where spent right away via lightning to a Robosats Host for a non KYC swap. So node has no lightning sats left. Some On-chain sats do remain on the node.

New info: The channel that was opened with the KYC sats was Cooperative closed by the channel peer. So that channel is no longer open.

Note: Every channel open before the KYC channel open have been all from coinjoined coins.

What would you do in this case for optimal privacy? close all open channels and start fresh with a new node? Is my coinjoin wallet utxo's privacy compromised? How would you go about it from here?

Thanks for your guidance!

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Yes, you doxxed your node to the exchange. To the other operator not in particular because he does not know that those are kyc coins. But the risk is higher, agree.

To be sure you probably have to recycle the node and coin join / swap your coins.

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2 sats \ 0 replies \ @k00b 2 Jul

Yes, I meant KYC-associated node not channel. Good catch.

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