There are a few errors:
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Bitcoin has been around since 2009, about a year after Satoshi Nakamoto published a paper about the digital currency.
The bitcoin paper was published in November 2008. Bitcoin was launched less than 2 months later.
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The official Bitcoin website ...
There is no official website.
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In order to prevent anyone from making changes to the records, blockchain is heavily encrypted and the miners use the processing power to decrypt the transaction records and the blocks to confirm its status.
The block chain is not encrypted.
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The Bitcoin network is designed in such a way that the difficulty levels of the cryptographic problems increase at regular intervals.
The difficulty is not designed to increase at regular intervals. It can also decrease or remain the same.
