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We verified vitalik's 2015 contracts: here’s how

Vitalik's 2015 Contracts Verified | Breaking New Ground in On-Chain Arbitration

By

James O'Reilly

Apr 25, 2026, 09:39 AM

Edited By

Tomoko Sato

3 minutes estimated to read

Researchers analyzing Vitalik Buterin's 2015 arbitration contracts with code displayed on a computer screen

A recent breakthrough reveals that three smart contracts developed by Ethereum co-founder Vitalik Buterin in 2015 now function flawlessly. Although primarily designed as an on-chain arbitration system, their successful verification has stirred excitement and raised eyebrows among crypto enthusiasts.

Background on Vitalik's Contracts

Two months after the launch of Ethereum's mainnet, Buterin deployed a three-contract arbitration framework using Serpent, an early programming language in Ethereum. These contracts aimed to simplify dispute resolution within decentralized agreements.

Key Contracts and Functions

  • ArbiterRegistry:

    • Address: 0x82afa2c4 (Block 301,954 | Sept 28, 2015)

    • Arbitrators list themselves by paying 1+ ETH. The listing fee decreases by 50% monthly, naturally pushing inactive mediators down the rankings.

  • Arbitration:

    • Address: 0xe881af13 (Block 303,316) + Block 318,029

    • This smart escrow facilitates fund transfers based on a majority vote from designated arbiters. For parties in a dispute, surrendering is allowed.

Interestingly, one user managed to invoke the register() function successfully in 2024.

Verification Process

Using a byte-for-byte comparison approach, experts analyzed the code to validate its original deployment. The divergence they found between the source committed to Ethereum and the actual contract necessitated meticulous scrutiny. They tracked the specific compiler used to compile the code and confirmed its accuracy through consistent bytecode matching.

Forensic Findings

"Vitalik's initial code had a minor error in the ArbiterNotification log. The arguments were indexed in reverse order. He corrected it in git post-launch, but the chain preserved the original."

Community Reactions

The crypto community has expressed a mix of enthusiasm and curiosity:

  • One commenter emphasized the contracts function despite multiple updates, saying, "Early contracts are expected to still work by design. Nice to see!"

  • Another noted the contracts are akin to decentralized middlemen: "It's similar to someone selling an NFT without trust. The arbitrators act as trusted parties."

Key Takeaways

  • πŸ”‘ Contracts deployed in 2015 remain functional, showcasing Ethereum's resilience.

  • 🌍 ArbiterRegistry allows mediators to position themselves competitively and earn fees.

  • πŸ’‘ The validation highlights ongoing relevance of smart contracts despite platform changes.

Looking Ahead

What does this successful verification mean for the future of decentralized arbitration? With various blockchain advancements, this episode reaffirms the long-term viability of older contracts in adapting to new innovations. As discussions continue, further insights will undoubtedly surface on forums and user boards.

Future Directions for Arbitration Technology

Experts estimate a solid chance that the success of Vitalik's 2015 contracts will ignite renewed interest in decentralized arbitration. This could lead to an influx of developers reexamining old smart contracts, reinterpreting their functions in the context of today's evolving crypto landscape. The reduced barriers to entry for decentralized arbitration might attract new users, eager to handle disputes without intermediaries. Furthermore, ongoing discussions on forums and user boards hint at developments like enhanced user interfaces and integration with newer blockchains, enhancing usability and accessibility. As these innovations materialize, the probability of long-term adoption grows stronger.

A Lesson from History's Innovations

Looking back, the refinement of early postal systems in the 18th century offers a relevant comparison. Just as the introduction of postal routes improved communication across vast territories, the successful verification of Vitalik's contracts could create more efficient dispute resolution systems in crypto. Initially, many doubted the need for such services when messages traveled by horse. However, as demands grew, services evolved, laying the groundwork for what we now recognize as modern ecommerce logistics. Similarly, today’s verified contracts may set the foundation for a future that redefines trust and transparency in digital exchanges.