on the morning of October 24th, Bitcoin browser data showed that block 920472 of Bitcoin was successfully mined by a miner named Tether/Est3lar, receiving a reward of approximately 3.13 BTC. The output label on Coinbase shows "ckpool / mined by Tether/Est3lar". Earlier on October 20th, Tether/Est3lar had mined block 919923. The same payment address had previously mined on F2Pool, with a hashrate of around several hundred PH/s. According to public information, ckpool is a standalone mining software that allows miners to mine individually without running a node, enabling them to operate independently and have the chance to directly win all block rewards.