Ethereum Classic (ETC)
Ethereum Classic (ticker: ETC) is the original Ethereum blockchain — the chain that continued unaltered after the majority of the Ethereum community executed a controversial hard fork in July 2016 to reverse the DAO hack. ETC embodies the “code is law” philosophical position: that blockchain immutability must be absolute, even when the outcome is unjust.
Origin: The 2016 DAO Fork
In June 2016, an attacker exploited a reentrancy vulnerability in The DAO smart contract, draining 3.6 million ETH (~$60M). The Ethereum community faced a stark choice:
| Option | Philosophical basis | Result |
|---|---|---|
| Hard fork — reverse the hack | Community can correct injustice even if the code “worked as written” | Became Ethereum (ETH) |
| Reject the fork — original chain continues | Code is law; blockchains must never be altered | Became Ethereum Classic (ETC) |
The fork executed on July 20, 2016, at block 1,920,000. Nodes that upgraded accepted the new chain (ETH); nodes that refused continued the original chain (ETC).
”Code Is Law” Philosophy
ETC’s four foundational principles:
- Immutability — Once committed, transactions and smart contract state cannot be reversed by any authority, including the developers
- Censorship resistance — No entity can block, roll back, or discriminate between transactions
- Sound money — Fixed maximum supply of 210.7 million ETC (mirroring Bitcoin’s capped model), creating digital scarcity
- True decentralisation — No foundation controls protocol upgrades; miner community and core developers govern via rough consensus
This positions ETC explicitly against the pragmatic interventionism that Ethereum (ETH) adopted.
Technical Specifications
| Feature | Detail |
|---|---|
| Consensus | Proof-of-Work (Etchash algorithm, ASIC-resistant but GPU-mineable) |
| Max supply | 210.7 million ETC (hard cap, like Bitcoin) |
| Circulating supply (2026) | ~147 million ETC |
| Smart contracts | Full EVM compatibility |
| Market cap rank | ~#50 (CoinMarketCap, 2026) |
| Price (2026) | ~$8.49 USD |
| All-time high | $176.16 (May 2021) |
ETC retained proof-of-work consensus even after Ethereum switched to proof-of-stake in September 2022, making it one of the largest PoW smart contract platforms.
Key Protocol Upgrades
ETC periodically upgrades to maintain compatibility with the EVM standard:
| Upgrade | Year | Content |
|---|---|---|
| Atlantis | 2019 | Ethereum Byzantium compatibility |
| Agharta | 2020 | Ethereum Constantinople compatibility |
| Phoenix | 2020 | Ethereum Istanbul compatibility |
| Magneto | 2021 | Gas efficiency (EIP-3529, EIP-3198) |
| Mystique | 2022 | Ethereum Berlin compatibility |
| Spiral | 2023 | Partial EIP-1559 compatibility |
ETC vs ETH Comparison
| Attribute | Ethereum (ETH) | Ethereum Classic (ETC) |
|---|---|---|
| Consensus | Proof-of-Stake | Proof-of-Work |
| Supply cap | None | 210.7M ETC |
| DeFi ecosystem | Massive (~$60B+ TVL) | Minimal |
| Developer activity | Very high | Low-moderate |
| EVM compatibility | Full | Full |
| Block governance | Community/EF coordinated | Miner-driven |
Sources
- coinmarketcap-2026-ethereum-classic — market data and ETC profile
- grokipedia-2026-ethereum-history — DAO hack historical narrative and fork details
Related concepts: dao-hack | proof-of-work | ethereum | blockchain | smart-contracts