Wiki / Forks / ClassicBitcoin (CBTC)

ClassicBitcoin (CBTC)CBTC

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

An Equihash fork at block 516,095 on 1 April 2018, tied to a BitClassic marketplace; still working in 2019 and releasing a v2 with liquidity mining later.

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The wiki's angle: ClassicBitcoin asked to be added to the 2019 fork list itself, in a reply by its own account.[1]

Contents

  1. Launch
  2. Design
  3. References

Launch

In an April 2018 reply to the fork list, the account bitclassic wrote: “ClassicBitcoin (CBTC) forked on 1st april 2018 at block 516095”[1]. Block 516,095 was mined on 1 April 2018[2]. The list records “ClassicBitcoin (CBTC) (1 BTC = 10000 CBTC)” and, on 26 February 2019, that it “seems to be working, 0.5 GB”[1].

Design

The announcement thread, opened on 10 March 2018, calls it “Cryptocurrency for the BitClassic MarketPlace” and describes an “ASIC resistant PoW algorithm, Equihash”[3]. Its current OP was last edited in November 2021[3]. The GitHub README advertises CBTC v2, with “Liquidity Mining starts on Block 170000 to 190000” and “Removal of the Community Fee structure”[4]. Its build steps use a zcutil build script[4].

References

  1. secondary“My list of 43(+3) reviewed Bitcoin forks”, Bitcointalk topic 2777849 (last update 26 Feb 2019) [archived]
  2. primarymempool.space, Bitcoin block 516,095 (header time 2018-04-01 07:01:43 UTC) [archived]
  3. primarybitclassic, “ClassicBitcoin (CBTC). Cryptocurrency for the BitClassic MarketPlace.”, Bitcointalk topic 3095296 (opened 10 Mar 2018; current OP) [archived]
  4. primaryClassicBitcoin (CBTC) README, GitHub classicbitcoins/cbitcoin [archived]

Related

Bitcoin Gold
The October 2017 fork that switched to GPU-mined Equihash, and later suffered repeated 51% attacks.
Bitcoin Private
A 2018 “fork-merge” that combined a Bitcoin UTXO snapshot with Zclassic's chain, then went offline in October
bitcoinClean (BCL)
An April 2018 fork at block 518,800 that promised mining only with renewable energy through a peer-reviewed “p
Categories: Forks · Fork lineage
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