Bitcoin 09

What It Is

Bitcoin 09 is Bitcoin's old idea with one deliberate swap: Argon2id memory-hard proof of work instead of SHA-256. Normal CPUs can mine it, and the 64 MiB memory cost is meant to reduce the easy ASIC/GPU advantage that took over Bitcoin.

Mining Policy

09C is permissionless proof of work. The official node miner is CPU mining, and the current public third-party btc09 miner is listed as CPU-only, but the chain does not try to detect or ban hardware. A valid block is valid work.

If a public GPU, FPGA, or heavily optimized miner appears, it should be shared and benchmarked like any other miner. A stronger CPU-biased PoW would require a coordinated hard fork, not pool-side rules.

Difficulty Retarget

09C follows the old Bitcoin rhythm: difficulty changes every 2,016 blocks and can only move by up to 4x per adjustment. If a lot of miners arrive early, blocks can run faster than the 10 minute target until the next retarget catches up.

That is why the site shows both the target and the observed average for the current retarget window. The target is the rule; the observed average is what miners are seeing right now.

Start Mining

btc09 node -mine

bitcoin09.tutuit.xyz

btc09 node

Node Notes

Mining only starts when -mine is present. A non-mining node still syncs, relays blocks and transactions, listens on :9009 by default, and can serve its own explorer.

btc09 node -explorer :8009

Wallet balance is calculated from your local synced chain, so a fresh node can show a balance later than the public explorer while it catches up. v0.1.10 and later sync fresh nodes in larger bounded batches and log balance changes as soon as the local chain sees them. Mined coinbase rewards become spendable after 100 blocks.

Wallet And Sending

09C is a native chain coin, not an Ethereum or Solana token. MetaMask and Phantom do not support it. Use the btc09 wallet/node for now.

btc09 wallet list
btc09 wallet new
btc09 send -to THEIR_09C_ADDRESS -amount 100 -seeds seed.btc09.org:9009

The default fee is 0.0001 09C. -seeds is plural and means peer nodes to broadcast through, not a wallet seed phrase. Do not paste private keys, seed phrases, or wallet file contents into the command line. send spends from the wallet file in your data directory, and your local chain must be synced enough to see spendable coins.

Watch The Chain

Live block explorer: height, difficulty, recent blocks and miner addresses.

The explorer exposes machine-readable supply data for listings and audits.

curl https://explorer.btc09.org/api/supply
curl https://explorer.btc09.org/api/circulating_supply

Markets

There is no official 09C price. Early trading is community OTC only: users can draft buy/sell records on the OTC board, copy a Discord post if they want chat, and open a public GitHub record for offers or completed trades. Discord also has an optional OTC escrow bot for small trades: it can hold the seller's 09C and release after both sides confirm, but off-chain payment still happens directly between buyer and seller.

Third-party Miners

NTMminer is a third-party closed-source binary miner, not the official 09C wallet or node. It only needs your payout address. Do not give any pool miner a seed phrase, private key, wallet file, remote access, or Discord token.

NTMminer has GPU support for some other algorithms, but the current public btc09 backend is listed as CPU-only. There is no official 09C GPU miner right now. If a third-party GPU miner appears, it is still permissionless mining. Treat any closed-source miner carefully: use only a payout address.

Read

• Official site
• Source code (MIT, Go)
• Whitepaper
• Quickstart
• Logo and brand files
• Discord
• Launch thread
• Bitcointalk ANN