BitcoinII

SHA-256 proof of work · No premine

What if you had a second chance?

Bitcoin’s rules. A fresh start.

“It might make sense just to get some in case it catches on.”

Satoshi Nakamoto, 2009

Many people wish they could have been mining Bitcoin since 2009. Absent a working time machine, this is the best chance at a second chance that we can provide. BitcoinII (BC2) is, in its whitepaper’s words, “a faithful re-deployment of the original protocol”: a new network with a clean genesis block, no premine, SHA-256 proof of work and a 21 million coin cap.

Get started Start mining
  1. 1. Get a wallet
  2. 2. Mine or buy BC2
  3. 3. Join the community

BC2 is not BTC. It is a separate network with its own coins. Why that matters

Check it yourself

Network, live

Watch the chain grow

Live numbers load from the public explorer when JavaScript is on.

Block height
—
Hashrate (estimate)
—
Difficulty
—
Last block
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Hashrate, last monthDaily average, estimated from blocks found

The chart needs JavaScript and the explorer. See the mining dashboard.

Next halving

— blocks to go

0%

At block 210,000, estimated from the recent block time. — of the 21 million cap issued so far.

Latest blocks

  1. Live data appears here when JavaScript is on. Open the explorer

All network charts and the mini explorer Open the block explorer

Source: explorer.bitcoin-ii.org

Get started

Get going in three steps

Everything runs on software you control. No account, no sign-up.

  1. 01 / WALLET

    Get a wallet

    Install BitcoinII Core, the official wallet and full node, from the official GitHub release.

    Get a wallet

  2. 02 / MINE OR BUY

    Get BC2

    Mine it with a SHA-256 ASIC or a Bitaxe-class home miner on a pool such as CapsPool.io, or buy it on the NonKYC.io exchange.

    Mine BC2 or buy BC2

  3. 03 / COMMUNITY

    Join the community

    Ask questions, get help and meet other BC2 users and miners.

    Join the community

Why BitcoinII

Proven money, kept simple

The rules Bitcoin made famous, on a network where every coin is still to be earned by mining.

  • Fair launch

    A clean genesis block with no premine. Every coin is mined under the same rules.

  • Proven rules

    Bitcoin’s monetary design: a 21 million cap, 50 coins per block halving every 210,000 blocks, and SHA-256 proof of work.

  • Money, not data

    Block space is kept for payments. Since block 57,750, consensus rules limit arbitrary data in transactions.

  • Complements Bitcoin

    “BitcoinII does not ask users to abandon Bitcoin.” It runs side by side with Bitcoin on the same computer, without conflict.

  • A place to learn

    Practise self-custody, wallet backups, running a node and mining with the same tools and address formats as Bitcoin. The skills carry straight over.

  • Built by its community

    No company, issuer or foundation. Built and maintained by volunteers. The community kept the chain running through difficult early periods and continues to build.

About BitcoinII How it works

Key facts

The rules, at a glance

Proof of work
SHA-256 (SHA-256d)
Maximum supply
21,000,000 BC2
Block time
Targets 10-minute blocks; actual intervals vary with hashrate
Halving
Every 210,000 blocks; the first is at block 210,000
Difficulty adjustment
ShockWave, every block (since block 57,750)
Current release
BitcoinII Core v31.1.0 (Aug 29, 2026)

View the live network on the explorer Network page: live block height and hashrate

Important distinction

BitcoinII is not Bitcoin.

BC2 and BTC are separate ledgers. Holding BTC does not give you BC2, and the address formats look the same, so never send coins between the two networks.

Read the safety guide

Roadmap

Milestones so far

Shipped and on-chain. What comes next is decided in the open by the community.

  1. Genesis block

    A clean start, no premine.

  2. Mainnet mining begins

    Block 1 is mined.

  3. Whitepaper published

    Read the PDF

  4. Core v29.1.0

    BitcoinII Core release.

  5. Core v31.1.0

    ShockWave difficulty adjustment.

News

Latest updates

All news

Tools

Plan it, set it up, watch it work

Free tools that run in your browser. No account, no tracking.

Choose your path

Mine it, hold it, or help build it

Pick where to start. Every path takes a few minutes.

Next: Get started →