You left out the last character. With this added, the signature is correct.
claim 83BTC refund fee from antpool
That's going to be interesting if several people claim to be the real owner. In that case following the coins up the chain and signing a message from one of the earlier addresses will be more convincing.
My take on what happened:Address
bc1qn3d7vyks0k3fx38xkxazpep8830ttmydwekrnl received funds, which were immediately transferred again. That happens to every
compromised private key, and many bots must be competing to be the first to steal funds. Usually, they use a high fee. In this case, my guess is that since more and more nodes accept full RBF, this lead to a very high transaction fee. Eventually, miners will get all stolen funds and the "private key hunters" will only be left with crummies. I hope the real owner can convince Antpool he's the real owner, so they don't send it to any of the private key hunters who also have the same private key.
I did some research, as a result of which I received the seed phrase of the wallet from which 139 BTC were stolen. I have evidence that this seed phrase was not generated by chance.
That's because
you are brute-forcing "easy" private keys.
if the owner did not create it himself, and this seed phrase was generated for him by some wallet, then I can provide evidence of non-random generation, as a result of which the owner will be able to go to court and recover lost funds from the creators of the wallet.
How about you read the "this software is provided as is"-licence that any wallet comes with?
In return I ask for a reward of 10%. I ask the owner of the lost funds to contact me. telegram @Crypto_Validator
Quoted for reference.