Since its inception in 2009, blockchain technology has seen an incredible evolution. The first blockchain-based application, Bitcoin, marked the beginning of it all. Bitcoin was designed with the goal of introducing a decentralized digital currency that would function independently of centralized governments and financial organizations. Blockchain, the technology that underpins Bitcoin, has served as a cornerstone for a paradigm shift in data security and trust. Its creator is the elusive Satoshi Nakamoto. He first presented the fundamental idea of Blockchain in a document called "Bitcoin: A Peer-to-Peer Electronic Cash System"[2] which is considered the starting point for anyone interested in this topic. If we were to simplify things further to make this idea easier to adopt, we would start by having one ledger where all transactions are recorded instead of everyone keeping their own books and separate records of each transaction. This ledger would be open to the public, accessible to all, and completely decentralized, meaning no one would own, control, or manage its data. Every time a transaction is made, such as sending bitcoins from one address to another, it is recorded, stored, and timestamped. No one could trade something they do not own because: • It would not be synchronized with transaction records or other users of the system. • Rules are established at the very beginning and implemented through program code. Due to the fact that the history of each transaction is saved and available in real time, it follows that the same product cannot be exchanged more than once. As everything has its own digital trail and record, two business partners can quickly and electronically carry out any exchange of value without the need for intermediaries or additional fees, regardless of how far they are from each other or how little they know about each other. Once a task (transaction) is completed, it is locked forever and cannot be changed.

Although the concept of Blockchain is widely recognized, there are different opinions about the technology and even its history. In Nakamoto's (2008) white paper 3 , the terms "block" and "chain" were used individually, and the idea was originally called blockchain. However, the concept eventually boiled down to the phrase "Blockchain" by 2016. When we talk about the history and chronological development of blockchain, it is appropriate to highlight the most important moments in the development of this phenomenon: We identify the invention of Bitcoin as the initial innovation (event) of Blockchain. Another innovation would be the concept of Blockchain technology, that is, the use of Bitcoin in numerous technological applications, banking and financial sectors and corporate ventures. According to statistics by Don Tapscott and Alex Tapscott in 2017, over 15% of banks worldwide used Blockchain technology. [5] A "smart contract" would be the third innovation, which would be immediately put into the Blockchain and used as legitimate and accessible data. In addition to using loans or bonds as financial instruments instead of Bitcoin and other cryptocurrencies, this would also include them. "Proof of Stake" and "Proof of Work" would be the fourth innovation. These companies, commonly referred to as "miners," are in charge of massive data centers and rely on cryptocurrency payments for security. Blockchain scaling is the sixth key development. Always working on improving technology and speeding up all procedures. Their goal is to facilitate work while maintaining safety and security. Here we examine the major milestones and historical achievements in blockchain technology. We explore how blockchain technology has evolved beyond currency, covering notable initiatives and platforms such as Ethereum, which offered smart contract functionality and opened the door to decentralized applications (DApps). Also covered are the development of consortium-based blockchain efforts such as Hyperledger and Corda, which aimed to meet the specific requirements of enterprises. This illustrates how blockchain has evolved from its humble beginnings to a disruptive force with the potential to change industries and redefine data security policies by studying the historical background of the technology.