b3chain

We're building a conservative Proof-of-Work L1 in the spirit of Bitcoin Core. Mainnet has not launched; the b3chain testnet is live for soak-testing.

Status: testnet live, no mainnet Ticker: B3C Focus: minimal PoW L1 Approach: conservative by design

Only this domain is official for b3chain / B3C. Anything else isn't us.

Notice: No mainnet — the b3chain testnet is live for soak-testing only and its B3C has no monetary value. No token sale, no airdrop, no exchange listing.

What this is

b3chain is an attempt at a minimal PoW chain that keeps Bitcoin's system model. No smart contracts, no new token economics — just the chain.

What we're not doing

  • Token sale or fundraiser
  • Airdrop
  • Smart-contract platform
  • Any promise on launch date or timeline
  • Investment advice

Working hypothesis (non-consensus)

Below is where we're heading so far. Nothing is frozen; this isn't a spec.

Base
Bitcoin Core fork
Model
UTXO + Proof-of-Work
PoW goal
Incompatible with Bitcoin SHA-256 ASICs
PoW algorithm
B3PoW-Scratch v1.1.1 — memory-hard BLAKE3 variant (1 MB scratchpad, 8 lanes, 2048 iterations)
Culture
minimal change, long-term stability
PoW(header, prev_block_hash) = b3pow_scratch(header, init_scratchpad(prev_block_hash))

Memory-hardness raises the cost-of-entry for ASIC manufacturers without claiming permanent ASIC resistance. The full algorithm spec lives in contrib/miner/b3miner-rtl/SPEC.md; a plain-English summary, bench charts, and quick links live on the B3PoW-Scratch landing page.

Testing & verification

We publish test scripts, PoW reference verifiers, and a structured Phase 11 self-audit so anyone can independently reproduce our results. If it's not reproducible from our published tools, it isn't b3chain.

Open the testing & verification hub →

Public testnet

The B3Chain testnet is live. Anyone can run b3chaind -chain=test, request free test coins from the faucet, and watch the chain in the explorer. Test B3C has no monetary value — this is the soak network before mainnet launch.

Identity and impersonation

The name b3chain and ticker B3C mean this project. Anything else is either us elsewhere or someone else — treat it with caution.

Only what's linked from this domain is official. No other assets, tokens, or networks using b3chain/B3C are ours unless we say so here.

Not us: github.com/b3cblockchain — do not clone, build, or download wallets from this account. Official source: github.com/b3chain/b3chain. Details →