Ethereum Classic

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Rank #65•Smart Contract Platform, Layer 1 (L1), Proof of Work (PoW)

CoinYQ Dossier

Ethereum Classic: The Unforked Chain That Turned a Crisis Into a Constitution

Ethereum Classic is easiest to misunderstand when reduced to an alternative ETH ticker. Its identity was forged at the 2016 DAO split, when one chain rewrote state and the other preserved the pre-fork history. The live result is a proof-of-work EVM chain with native ETC, a fixed-policy emission schedule, and governance that depends on implementers rather than an issuer—but those design choices do not remove application, mining, or bridge risk.

A chain born from a disagreement about finality

Ethereum launched as a proof-of-work smart-contract platform in July 2015. The DAO exploit in June 2016 exposed a recursive-call vulnerability in The DAO contract and forced a dispute over whether social coordination should override the ledger's recorded state.

At block 1,920,000 on July 20, 2016, the majority Ethereum chain executed a state-changing hard fork to move DAO-related funds to a recovery contract. Participants who declined that change continued the unforked chain; exchanges listed it as Ethereum Classic on July 24. The historical split, rather than a later marketing relaunch, is the project's canonical identity event.

The live product is a PoW EVM mainnet, not its roadmap

ETC currently provides a public EVM-compatible Layer 1: ETC pays transaction and computation fees, ETCHash miners secure blocks, and developers can deploy smart contracts and dApps. The official overview gives chain ID 61 and describes mainnet operation since 2015. This is the product claim that can be verified from the running network and explorer, not a promise about the success of every application.

ECIPs describe proposed or implemented protocol changes, but the repository explicitly says that a document is not an accepted standard merely because it is present. Future EVM upgrades, ecosystem applications, and bridge plans should therefore be labeled as planned or conditional until implemented by clients and adopted by the network.

What ETC represents—and what it does not

ETC is native protocol money: it is used for gas and paid to miners under consensus rules. ECIP-1017's 5M20 schedule reduces rewards by 20% every five million blocks and sets an approximate 210.7 million upper-bound model. The current project tokenomics page describes no ongoing treasury allocation from block rewards and distribution of new coins to miners.

The holder right evidenced here is control over a native balance and use of the network, not a legal share of a foundation, a claim on application revenue, or a redemption right. ETC itself has no single token-contract owner who can mint, freeze, or pause all balances. Protocol upgrades can still change rules if a hard fork gains sufficient support among client teams and implementers; that social coordination is a governance surface, even without an administrator key. Wrapped ETC, bridges, and dApps add their own contracts, custodians, upgrade keys, and failure modes.

How the project changed

2015-07-30
Ethereum mainnet launches
Ethereum launches as a proof-of-work blockchain with native smart-contract execution, the shared history from which ETC later continues.
2016-06-17
The DAO exploit
A recursive-call vulnerability in The DAO contract drains approximately 3.6 million ETH into a child DAO, triggering the protocol-intervention dispute.
2016-07-20
DAO hard fork at block 1,920,000
The forked Ethereum chain moves DAO-related funds to a recovery contract; the unforked chain continues with the original state.
2016-07-24
The unforked chain is listed as Ethereum Classic
The surviving unforked network receives the ETC name and ticker in exchange markets, making the historical split a distinct chain identity.
2016-08-13
Ethereum Classic Declaration of Independence
The ETC community publishes a statement of principles centered on immutable history, protocol neutrality, and distributed development.
2016-11-20
ECIP-1017 proposes the 5M20 monetary policy
The monetary policy proposal replaces perpetual issuance with 20%-decreasing five-million-block eras and an approximate 210.7 million upper bound.

What to verify before relying on the token story

Proof-of-work majority attacks remain a project-specific security risk: an attacker with sufficient hashpower can reorganize recent history or enable double-spend attempts, so exchange confirmations and hashpower conditions matter.
The 210.7 million figure is an approximate policy upper bound derived from emission assumptions; a future hard fork could alter consensus rules if broad implementer support emerges, while a contentious fork could split the network.
“Code is law” and governance minimization reduce unilateral issuer control but do not eliminate social coordination: client teams, miners, exchanges, wallets, and large stakeholders can shape which ECIPs become live rules.
ETC is a base chain, not a guarantee of application safety. Smart contracts, dApps, bridges, wrapped assets, and custodians can have independent bugs, pause or upgrade keys, insolvency exposure, or administrative control.
The official live-product evidence establishes the EVM/PoW mainnet, not the completion of every ecosystem or roadmap item. Users should distinguish deployed contracts and active clients from ECIPs that are draft, proposed, or not yet implemented.
Native ETC has no vesting schedule in the cited token-contract sense because it is protocol-issued rather than a private sale ERC-20. Distribution still depends on historical genesis balances, mining issuance, and current ownership concentration, which should be checked on-chain rather than inferred from marketing claims.

Evidence and primary sources

Last evidence review: 2026-08-25

What is Ethereum Classic?

Ethereum Classic is a public, open-source Layer 1 blockchain with Ethereum Virtual Machine compatibility, native smart contracts, and ETCHash proof-of-work consensus. The live product is the chain itself: users transfer ETC, pay gas, deploy contracts, and interact with applications that support ETC.

The name reflects a historical identity choice. After The DAO exploit, the Ethereum network hard-forked at block 1,920,000 on July 20, 2016. Participants who kept running the unforked history formed the chain later listed as Ethereum Classic. ETC is therefore the native coin of that chain, not a wrapped or ERC-20 version of ETH.

What problem does Ethereum Classic solve?

The original problem was social and technical: the DAO exploit forced Ethereum participants to choose between an irregular state change to recover funds and preserving the existing transaction history. Ethereum Classic emerged for participants who treated transaction finality and “code is law” as the stronger constraint.

Today, the protocol addresses the general Layer 1 problem of executing smart contracts and transferring value without a central operator. Its design emphasizes permissionless proof-of-work participation, EVM compatibility, predictable issuance, and resistance to unilateral protocol intervention. These are protocol properties, not guarantees that every application built on ETC is safe or that every roadmap proposal will ship.

How does Ethereum Classic work?

ETC uses ETCHash proof of work: miners expend computational resources to propose and secure blocks, and smart contracts execute in the EVM. ETC is the native gas asset for transactions and contract execution. The official technical policy describes the 5M20 schedule: block rewards fall 20% at each 5,000,000-block era, yielding an approximate 210.7 million maximum under the policy's upper-bound assumptions.

ETC has no ERC-20-style issuer contract whose owner can mint, freeze, or pause all balances. Protocol changes are coordinated through Ethereum Classic Improvement Proposals and require adoption by client developers, miners, node operators, exchanges, wallets, and users. A proposal in the repository is not automatically active. A future change to monetary policy or execution rules would require the relevant hard-fork/client adoption process; this is a social and technical control, not an administrator key. Bridges and applications may introduce separate contracts and custodians, whose controls must be checked individually.

Key facts

Ethereum Classic is the unforked chain that continued after the DAO hard fork at block 1,920,000 on July 20, 2016; it was listed as ETC on July 24, 2016.
The live mainnet is EVM-compatible, uses ETCHash proof of work, and identifies as chain ID 61 in the official technical overview.
ECIP-1017's 5M20 policy reduces block rewards by 20% every 5,000,000 blocks and describes an approximate 210.7 million ETC upper bound.
ETC is a native coin used for gas and miner rewards, not a single ERC-20 token issued by a project administrator.
The protocol's monetary policy is enforced by consensus rules; changing the cap or emission requires a hard fork and broad implementation, not a privileged mint call.
The ECIP repository distinguishes proposals from implemented standards: a document becomes Final only after the relevant consensus and process requirements.

Official links

Official website Whitepaper Block explorer X / Twitter GitHub

Related coins

Frequently asked questions

Is Ethereum Classic the same token as Ethereum (ETH)?

No. ETC is the native coin of the Ethereum Classic chain, while ETH is the native coin of Ethereum's post-fork chain. They share history before block 1,920,000 but are separate networks afterward; ETC is not a wrapped ETH asset.

What rights does an ETC holder have?

Holding ETC provides control of the holder's own spendable native balance and the ability to pay gas or participate in applications. The sources do not establish a legal claim to project revenue, treasury assets, dividends, or redemption. ETC holders do not receive a corporate ownership interest merely by holding the coin.

Can an administrator mint, freeze, or upgrade ETC?

There is no single ETC token contract administrator with ERC-20 mint, pause, or blacklist control. Native-coin monetary and execution changes require a protocol change adopted through clients and network implementers, normally a hard fork. Individual dApps, bridges, and wrapped assets can have their own administrator keys and must be audited separately.

What is ETC's supply schedule?

ECIP-1017 and current official tokenomics describe 5M20: a 20% reduction in block rewards every 5,000,000 blocks, with an approximate 210.7 million ETC upper bound. The figure is a protocol-policy upper bound, not a promise that a particular market feed's circulating estimate is exact.

What is Ethereum Classic's current product?

The current product is a live EVM-compatible Layer 1 mainnet secured by ETCHash proof of work. Transfers, gas payments, contract deployment, and compatible applications are live protocol capabilities. ECIPs and ecosystem projects marked as proposed or under discussion are not evidence of completed features.

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Ethereum Classic