Block explorers are online search tools that can be used to find specific pieces of blockchain data. Users can search for block contents, transaction addresses, the network hash rate of a blockchain, and so on. There are various block explorers available for Bitcoin and other altcoins. Users can leverage block explorers to observe blockchain activity in real-time. Miners, for example, can confirm that they have successfully mined a block. In addition, block explorers show how much a miner has earned, what addresses rewards have been sent to, and the number of confirmations associated with a block. Cryptocurrency traders use block explorers to check transaction statuses, track blockchain activity, and obtain market data.