CAPTCHA CHAIN
Cross-Chain Human Verification Network
Whitepaper v1.0 | March 2026
Abstract
Captcha Chain introduces a revolutionary cross-chain human verification protocol that enables seamless proof-of-humanity across multiple blockchain networks. By leveraging advanced cryptographic techniques and decentralized oracles, Captcha Chain creates a unified identity layer that works everywhere in Web3.
Table of Contents
1. The Identity Crisis
Web3 faces a fundamental challenge: proving humanity across isolated blockchain networks. Each chain operates as a silo, forcing users to verify themselves repeatedly while bots exploit these fragmented systems.
- Users must verify separately on each chain
- Verification credentials don't transfer
- Bots exploit cross-chain arbitrage
- No unified reputation system exists
2. Cross-Chain Architecture
Captcha Chain uses a hub-and-spoke model with a central verification hub that communicates with chain-specific spokes through secure oracles.
Verification Hub
Central coordinator managing verification state across all supported chains.
Chain Oracles
Secure bridges transmitting verification proofs between chains.
5. Tokenomics
6. Roadmap
Mainnet Launch
Ethereum and Solana integration live
Chain Expansion
25+ chains integrated