In reality, you can check your Bitcoin balance and transaction history directly with your own wallets, nodes and even don't need any Bitcoin block explorer to do it.
Bitcoin block explorers practically provide a lot of convenience for us. Obviously we have to be careful when using block explorers because they are centralized hosted and our privacy can be leaked. Use them with Tor connection if you do care about your privacy.
Let's return to this topic.
What is the first Bitcoin block explorer in history?
It is built by theymos. Are you surprised?
Bitcoin Block ExplorerIt used to be hosted at
http://theymos.ath.cx:64150/bbe/It was live on November 10, 2010.
At some points of time, it was mirror hosted at
https://109.123.116.245/Need mirror for blockexplorer.comHow does the first Bitcoin block explorer look like?
See its archive:
https://web.archive.org/web/20101113061427/http://theymos.ath.cx:64150/bbe/I use it to explore the Bitcoin Genesis block and get a result as follows.