Fifteen years ago, the first altcoin, Namecoin, was launched, which directly forked Bitcoin's code.


Before its appearance, the world only had Bitcoin.
Namecoin had several innovations:
◦ Pioneered the joint mining model, where miners mining BTC could also mine Namecoin with the same computing power, killing two birds with one stone.
It inspired later sidechains and Layer 2 solutions.
◦ Created the blockchain domain .bit, which is an early form of Web3 decentralized identity.
It inspired subsequent services like ENS.
◦ Demonstrated in practice that blockchain can serve as a decentralized database to store key-value pairs (Key-Value pairs).
It inspired later smart contract platforms' design for state storage.
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