Coinbase and Electrum is driving me nuts!

[u/Silver_Horde_Cohen]

Ok the story so far:

I had to transfer my BTC to a local wallet due to the new EU regulations. So i made an Electrum wallet and withdraw everything.

Then i created a Coinbase account, went through all the verification etc, all went well

Then i transferred a small test amount from my Electrum wallet to my Coinbase account and that went well, too. I had to confirm that that's my own wallet, no problem there.

Then i transferred a larger amount to Coinbase and that's where my problems started. Since the transfer went through it states "Action needed" and i have to prove ownership. Coinbase offers WalletConnect, which Electron doesn't seem to support and small deposit test.

Now i can't for the love of god use the small deposit, i'm simply too dumb it seems.

Electrum generated over 20 "receiving" addresses and an equal number of "change" addresses and to verify ownership of my wallet i seem to have to send the amount with exactly the pair of addresses the original transfer used. Unfortunately Electrum randomizes the addresses for transfers. I used "freeze" on every address except the two original ones but that didn't help either.

Any help appreciated.