It relies on consensus mechanisms to validate and secure data, which makes this technology significant because it addresses challenges present in traditional databases, such as the need for a trusted third party and the risk of centralised vulnerabilities. 

By decentralizing control and utilizing cryptography, blockchain ensures the security and integrity of transactions. The hallmark of blockchain technology is its ability to create an immutable record of transactions, meaning once data is recorded, it cannot be altered or deleted.

So how exactly does a blockchain work? 

The immutable nature of blockchain is one of its defining features and a key factor in its widespread adoption and application across various industries. In simple terms, immutability refers to the inability to change or alter data once it has been recorded on the blockchain. This characteristic is achieved through a combination of cryptographic techniques, consensus mechanisms, and distributed network architecture. 

While the underlying mechanisms are complex, we are still able to give an overall summary of this process. A blockchain stores data in blocks that are linked together using cryptographic techniques, hence the term "blockchain." Each block contains transactional data, such as the movement of physical or digital assets between parties in the blockchain network, and once filled, it is encrypted and added to the chain. Transactions on a blockchain undergo a verification process, typically involving miners or validators who use computational power to solve complex mathematical problems. This process ensures the integrity and security of the blockchain by having most participants on the distributed network agree on the validity of the recorded transaction. 

Once the participants have reached a consensus, transactions are written into the blocks to which the cryptographic techniques are applied to “chain” them together. A term used to define these links is a cryptographic hash, which acts as a chain that links the blocks together. On the occasion that the contents of a block are intentionally or unintentionally modified, the hash values are changed, which provides a way to detect data tampering. This is the reason why the intricate relationship between the blocks and chains is considered secure, as you cannot edit the chronologically consistent data, that is delete or modify it, without consensus from the network. 

Another important feature of blockchain is its decentralised natured. Decentralisation is a fundamental characteristic of blockchain technology, the reason being that by distributing data across multiple nodes in a network (computers or devices that run software for the blockchain), blockchains eliminate the need for a central authority, reducing the risk of tampering or manipulation. This reduces the need for trust among participants and prevents them from exerting authority or control over one another. Decentralisation also enhances transparency and resilience, as no single point of failure exists within the network. 

As blockchain technology continues to mature, its adoption is expected to accelerate across various sectors. Innovations like non-fungible tokens (NFTs), smart contracts, and scalable blockchain solutions are driving further exploration and investment in the field. While challenges remain, the potential for blockchain to revolutionize business and governance processes is undeniable. 

In conclusion, blockchain technology has emerged as a revolutionary force, offering decentralized and secure solutions for recording transactions and storing data. Its advanced database mechanism facilitates transparent information sharing within a network, creating an unalterable ledger for tracking transactions. By relying on cryptographic techniques, consensus mechanisms, and distributed network architecture, blockchain ensures the security and integrity of transactions. 

Overall, blockchain technology represents a paradigm shift in how we manage and secure digital transactions and data, offering innovative solutions to traditional challenges in database management. As blockchain continues to evolve and expand its reach, its potential to transform industries and drive innovation remains significant.