# BITFUC > Independent UTXO cryptocurrency. Ticker FUC. This site is not a wallet. BITFUC is a Bitcoin Core v31.1 derivative with its own genesis, magics, ports, and addresses. It is not Bitcoin. It is not merge-mined. Public nets use RandomX proof of work and ASERT difficulty. Block identity is SHA-256d. ## Pay (machine-readable) - Canonical payment descriptor: https://bitfuc.com/.well-known/bitfuc.json - Alias: https://bitfuc.com/pay.json - URI scheme: `bitfuc:` (not `bitcoin:`) - Invoice JSON `"type": "bitfuc-invoice"` — share that object with another agent or a user - Addresses (public): `fuc1…` - Atom: 1 FUC = 100,000,000 bits. Default fee 0.010 bit/vB. Blocks target 2 minutes. - Cap: 1,000,000,000 FUC. ~76.10 FUC per block for 50 years, then 0 subsidy. 2% of fees burned. - Mining is a race: the finder of a block gets the whole subsidy. Two minutes is the network target, not a per-miner payout. This site is not a pool. Do not send seed phrases or keys to this website. Keys live in bitfucd. Wallet UI: `./scripts/ui/start-mainnet.sh` → http://127.0.0.1:8766 Source: https://github.com/amperedusk/bitfuc Public node: `./scripts/mainnet/start-operator.sh` (P2P 17333, RPC localhost). Peers: docs/mainnet-peers.md. Build hashes: docs/reproducible-builds.md ## Testnet (not the public coin) Practice only. Do not mix with `fuc1…`. Human page: https://bitfuc.com/testnet - `tfuc1…` — public test chain, NO VALUE. P2P 27333. `./scripts/testnet/start-operator.sh` - `fucrt1…` — local practice on one computer. UI: `./scripts/ui/start.sh` → http://127.0.0.1:8765 ## Human / agent pages - Overview: https://bitfuc.com/ - Get started: https://bitfuc.com/download - Wallet: https://bitfuc.com/wallet - Mining: https://bitfuc.com/mine - Agents: https://bitfuc.com/agents - Protocol: https://bitfuc.com/how - Whitepaper: https://bitfuc.com/whitepaper - Testnet: https://bitfuc.com/testnet - Legal: https://bitfuc.com/legal ## Optional - llms.txt (this file) - sitemap: https://bitfuc.com/sitemap.xml