Developed a formal BlockProof wire format specification for the hiero-ledger/hiero-improvement-proposals repository, focusing on encoding details and compatibility considerations for cryptographic libraries. The work established a standardized reference to enhance interoperability and reduce integration risk across related systems. Leveraging expertise in cryptography, protocol design, and technical writing, the developer authored comprehensive documentation in Markdown, ensuring clarity and traceability through a signed-off commit and pull request workflow. The specification, implemented under hip-1200, provides future-proof guidance for developers integrating BlockProof, supporting robust protocol evolution. No bugs were reported or fixed during this period, reflecting a focus on foundational feature delivery.