Bitcoin Private (BTCP): What It Is, How It Works, and Where It Stands
Bitcoin Private (BTCP) is a privacy-focused cryptocurrency created in 2018 through a "fork-merge" that combined the balances of Bitcoin and ZClassic into a single new blockchain. Holders of BTC and ZCL received BTCP at a 1:1 rate via a snapshot airdrop. BTCP added optional transaction privacy using zk-SNARK zero-knowledge proofs borrowed from Zcash, while keeping a 2.5-minute block time, a 2 MB block size, and the ASIC-resistant Equihash proof-of-work algorithm for GPU mining. It launched with no pre-mine or founder's reward, but the airdrop concentrated most supply among existing whales, and the coin's market relevance declined after its 2018 peak.
Bitcoin Private (BTCP) is a privacy-focused cryptocurrency created in early 2018 through an unusual "fork-merge" that combined the UTXO sets of Bitcoin and ZClassic into a single new chain. Its core promise was simple: keep the open, peer-to-peer nature of Bitcoin while adding optional transaction privacy borrowed from Zcash. Holders of BTC and ZCL at the February 28, 2018 snapshot received BTCP at a 1:1 rate. Today BTCP is best understood as a historical privacy-fork experiment rather than an active, liquid market, so understanding its mechanics matters more than chasing a price.
What Is Bitcoin Private?
Bitcoin Private was an open-source, community-driven coin designed to be faster and more private than Bitcoin while remaining decentralized. It shipped with a 2.5-minute block time (versus Bitcoin's ~10 minutes), a 2 MB block size, and the ASIC-resistant Equihash proof-of-work algorithm, which made it minable on consumer GPUs.
The defining feature was inherited privacy. BTCP used zk-SNARKs — the same zero-knowledge proof technology that underpins Zcash — to let users send "shielded" transactions. The amounts and the parties involved could be hidden from the public ledger, while the transaction itself was still recorded for network integrity.
The fork-merge mechanic
A standard fork splits one chain into two. Bitcoin Private did the opposite: it co-forked two existing chains and merged their balances into a brand-new genesis state. This made it one of the first projects to demonstrate how malleable a combined UTXO set can be — an idea that was technically novel at the time.
How BTCP Was Distributed: The 2018 Airdrop
BTCP was launched via an airdrop rather than an ICO or pre-mine. A snapshot of all BTC and ZCL balances was taken on February 28, 2018, and eligible holders could later claim BTCP at a 1:1 ratio.
Worked example
Suppose a user held the following at the snapshot block:
| Asset held at snapshot | Amount | BTCP claimable |
|---|---|---|
| Bitcoin (BTC) | 0.5 | 0.5 |
| ZClassic (ZCL) | 100 | 100 |
| Total BTCP | — | 100.5 |
So a wallet with 0.5 BTC and 100 ZCL could claim 100.5 BTCP. Because BTCP had no founder's reward and no pre-mine, the entire supply was allocated to existing holders — a model marketed as "fair launch."
BTCP vs Bitcoin: A Quick Comparison
| Property | Bitcoin (BTC) | Bitcoin Private (BTCP) |
|---|---|---|
| Block time | ~10 minutes | 2.5 minutes |
| Block size | ~1–4 MB (with SegWit) | 2 MB |
| Privacy | Transparent by default | Optional zk-SNARK shielded transactions |
| Consensus | SHA-256 PoW (ASIC-dominated) | Equihash PoW (ASIC-resistant) |
| Max supply | 21 million | ~21 million (20.3M via airdrop) |
| Distribution | Mining only | Airdrop to BTC + ZCL holders |
The headline trade-off: BTCP offered faster confirmations and privacy, but it inherited Bitcoin's brand recognition without its liquidity, security budget, or network effect.
Storing and Claiming BTCP
At launch, BTCP could be stored in a full-node desktop wallet (Windows, Linux, macOS), an Electrum-style lightweight wallet, or a paper wallet for cold storage. Claiming followed these steps:
- Move your BTC and ZCL to a fresh address before claiming, to protect your existing funds.
- Choose a wallet (full-node or Electrum).
- Import or "sweep" the private key that held your BTC/ZCL at the snapshot into the BTCP wallet.
- Confirm the swept BTCP balance appears in a new address you control.
Mining Bitcoin Private
Because Equihash is ASIC-resistant, BTCP was designed to be minable at home with a GPU. The project ran an official mining pool, and several third-party pools existed — some verified by the developers, some unverified and unsafe. Solo mining was possible but pool mining offered steadier rewards.
Risks and Pitfalls
BTCP's story is also a checklist of crypto risks worth internalizing:
- Airdrop centralization. Roughly 20.3 million of the ~21 million coins went to existing whales, so the "fair" distribution still concentrated supply heavily.
- Phishing and scam wallets. The team repeatedly warned that fake "official wallet" sites tried to harvest seed phrases and private keys. Never enter a private key into a website.
- Liquidity collapse. Forks that lack sustained development and exchange support tend to lose volume and delistings follow. BTCP's market relevance faded sharply after its 2018 peak.
- Privacy is opt-in. zk-SNARK shielding only protects transactions that actually use it; transparent transactions leak the same metadata as Bitcoin.
- Snapshot dependency. If you never held BTC/ZCL at the snapshot, there was no way to "earn" the airdrop — it was a one-time event.
COINOTAG Perspective
Bitcoin Private matters less as a tradable asset and more as a case study. It showed that UTXO sets are programmable enough to be merged across chains, and it stress-tested the "fork plus airdrop" launch model that later projects copied. But it also illustrated the lifecycle risk of fork coins: novelty and a free airdrop can generate an explosive launch, yet without a durable developer community, real liquidity, and a clear use case beyond the parent chains, valuation tends to mean-revert toward zero. For anyone evaluating a new privacy fork today, BTCP is the template to learn from — copy the cryptography, not the tokenomics.
For deeper background on how these events work, see our guide to [hard forks and airdrops](https://en.coinotag.com/guide/getting-hardforks-airdrops), the difference between [soft forks and hard forks](https://en.coinotag.com/guide/soft-fork-vs-hard-fork), and [how mining pools work](https://en.coinotag.com/guide/how-mining-pools-work).