Public blockchains lack native mechanisms to attribute on-chain actions to legally accountable entities, creating a fundamental barrier to institutional adoption and regulatory compliance. This paper presents an architecture that extends the European Union eIDAS trust framework into public blockchain ecosystems by cryptographically binding smart contracts to qualified electronic seals issued by Qualified Trust Service Providers. The mechanism establishes a verifiable chain of trust from the European Commission List of Trusted Lists to individual on-chain addresses, enabling machine-verifiable proofs for automated regulatory validation, such as Know Your Contract, Counterparty, and Business checks, without introducing new trusted intermediaries. Regulatory requirements arising from eIDAS, MiCA, PSD2, PSR, and the proposed European Business Wallet are analyzed, and a cryptographic suite meeting both eIDAS implementing regulations and EVM execution constraints following the Ethereum Fusaka upgrade is identified, namely ECDSA with P-256 and CAdES formatting. Two complementary trust validation models are presented: an off-chain workflow for agent-to-agent payment protocols and a fully on-chain workflow enabling regulatory-compliant DeFi operations between legal entities. The on-chain model converts regulatory compliance from a per-counterparty administrative burden into an automated, standardized process, enabling mutual validation at first interaction without prior business relationships. As eIDAS wallets become mandatory across EU member states, the proposed architecture provides a pathway for integrating European digital trust infrastructure into blockchain-based systems, enabling institutional DeFi participation, real-world asset tokenization, and agentic commerce within a trusted, regulatory-compliant framework.

翻译：公共区块链缺乏将链上行为归因于法律可问责实体的原生机制，这构成了机构采用与监管合规的根本障碍。本文提出一种架构，通过将智能合约与合格信任服务提供商签发的合格电子印章进行密码学绑定，将欧盟eIDAS信任框架扩展至公共区块链生态系统。该机制建立了从欧盟委员会可信列表清单到单个链上地址的可验证信任链，使得无需引入新的可信中介即可实现机器可验证的自动化监管合规证明（例如了解您的合约、交易对手及业务核查）。本文分析了eIDAS、MiCA、PSD2、PSR及拟议的欧洲商业钱包产生的监管要求，并确定了一套同时满足eIDAS实施条例与以太坊Fusaka升级后EVM执行约束的密码学套件，即采用P-256曲线的ECDSA算法与CAdES格式化方案。我们提出了两种互补的信任验证模型：适用于代理间支付协议的链下工作流，以及支持法人实体间合规DeFi操作的完全链上工作流。链上模型将监管合规从每笔交易对手的管理负担转变为自动化、标准化的流程，使得无需预先建立业务关系即可在首次交互时实现双向验证。随着eIDAS钱包在欧盟成员国成为强制要求，所提出的架构为将欧洲数字信任基础设施整合至基于区块链的系统提供了路径，从而在可信且合规的框架内实现机构DeFi参与、现实世界资产代币化以及自主代理商业活动。