# Bitcoin Milestones: Evolution from 2009 to 2026

> Published on ADIN (https://adin.chat/s/bitcoin-technological-milestones-timeline-1q3o)
> Type: Diagram
> Date: 2026-04-29
> Description: Explore a detailed timeline of Bitcoin’s key technological breakthroughs and protocol updates shaping its journey.

Mermaid diagram:
timeline
    title Bitcoin Technological Evolution (2009–2026)

    2009 : Genesis Block
         : Original Bitcoin protocol
         : SHA-256 proof-of-work consensus

    2012 : BIP Process Established
         : Bitcoin Improvement Proposals formalized
         : P2SH #40;Pay-to-Script-Hash#41; support

    2013 : Multisig Support
         : Enhanced transaction security
         : Foundation for complex contracts

    2015 : CHECKLOCKTIMEVERIFY #40;BIP 65#41;
         : Time-locked transactions
         : Enables payment channels

    2016 : Relative Timelocks #40;BIP 68/112/113#41;
         : Sequence number semantics
         : Advanced smart contract capabilities

    2017 : SegWit Activation #40;BIP 141#41;
         : Transaction malleability fix
         : Block size increase to ~4MB
         : Lightning Network enabled

    2018 : Lightning Network Mainnet
         : Instant micropayments
         : Second-layer scaling solution
         : Payment channel networks

    2019 : Schnorr Signatures Development
         : More efficient signatures
         : Enhanced privacy capabilities

    2021 : Taproot Activation #40;BIP 340/341/342#41;
         : Schnorr signatures live
         : MAST #40;Merkelized Abstract Syntax Trees#41;
         : Enhanced privacy and efficiency

    2022 : Taproot Adoption
         : Smart contract improvements
         : Ordinals and inscriptions emerge

    2023–2024 : Layer 2 Expansion
              : Lightning Network growth
              : Liquid Network development
              : RGB protocol advancement

    2025–2026 : Covenant Proposals
              : CTV #40;CheckTemplateVerify#41; discussions
              : Vault implementations
              : Advanced programmability research