How Does a Blockchain Work - Tokenview Block Explorer
A blockchain just like a spreadsheet. Everyone has access to the data within each individual cell and saves a copy to their personal computer. The data within the spreadsheet is shared between multiple people. And nobody can alter the individual cell or change the information existed on the blockchain.
If you wanted to add a new cell to the spreadsheet. This would require approval from members who have access to the spreadsheet data. If you want know the information on the blockchain you can vist Tokenview Block Explorer to search every information on the blockchain.