Wiki / Forks / Bitcoin 2 (BTC2)

Bitcoin 2 (BTC2)BTC2

From the Bitcoin Takeover Wiki · ✓ 4 sources · 0 podcast anchors · built 2026-11-13

A proof-of-stake snapshot fork of Bitcoin balances at block 507,850, with masternodes and Zerocoin-based zBTC2 privacy; a 2019 review found it running.

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The wiki's angle: Bitcoin 2 kept Bitcoin's balances and dropped nearly everything else — mining, SegWit and the history — which is why the snapshot forks sit at the edge of the lineage map.[1]

Contents

  1. Snapshot
  2. Design
  3. References

Snapshot

The README says “the balances of Bitcoin as of block 507850 were recorded to it”, while the chain itself was only about 1.5 GB[1]. Block 507,850 was mined on 5 February 2018[2]. The 2019 fork list calls it a snapshot fork and quotes the project: “the blockchain data will be pruned from over 150 GB to around 2 GB”[3]. The announcement thread, opened by jackleszz on 3 February 2018, is titled “[BTC2] Bitcoin 2, BTC Fork 1:1, PoS”[4].

Design

Bitcoin 2 “uses a custom, secure Proof of Stake algorithm”, has masternodes for its Swift TX feature, offers zBTC2 coin mixing and makes blocks about once per minute[1]. It “does not support Segwit or the Bech32 address format”[1]. The fork list's 26 February 2019 status says it “seems to be working, 1.2 GB”[3].

References

  1. primaryBitcoin 2 README, GitHub BITC2/bitcoin2 [archived]
  2. primarymempool.space, Bitcoin block 507,850 (header time 2018-02-05 21:16:26 UTC) [archived]
  3. secondary“My list of 43(+3) reviewed Bitcoin forks”, Bitcointalk topic 2777849 (last update 26 Feb 2019) [archived]
  4. primaryjackleszz, “[BTC2] Bitcoin 2, BTC Fork 1:1, PoS”, Bitcointalk topic 2871452 (3 Feb 2018) [archived]

Related

Bitcoin Nano (BTN)
A snapshot fork of Bitcoin at block 501,888 at 1 BTC = 1,000 BTN, with Equihash, 8 MB blocks and planned EVM s
MicroBitcoin (MBC)
A 2018 hard fork at a 1 BTC = 10,000 MBC ratio that changed proof of work three times and in 2019 restarted on
Bitcoin Private
A 2018 “fork-merge” that combined a Bitcoin UTXO snapshot with Zclassic's chain, then went offline in October
Categories: Forks · Fork lineage
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