Relax OP_RETURN standardness restrictions

The utilization of OpenTimestamps for timestamping services has seen a notable increase, with the current rate reaching approximately 2.1 requests per second, as observed from a two-week log analysis. This surge can be attributed to a significant shift away from using OP_Return for timestamping purposes, following efforts to educate users on more efficient alternatives. The success of these initiatives demonstrates the potential for optimization in blockchain operations by adopting more suitable technologies for specific needs. However, challenges remain in addressing the diverse requirements of various use-cases.

For instance, Citrea's operations illustrate a scenario where mere commitments through timestamping are insufficient to meet their needs. They require proof-of-publication to ensure the validity and integrity of their transactions. This requirement underscores a broader necessity within the blockchain ecosystem for mechanisms that provide beyond simple commitments, highlighting the complexity and variety of demands across different applications. The importance of proof-of-publication is further exemplified by its integral role in the functioning of the Lightning Network. Here, the publication of a pre-image through an HTLC transaction is crucial for the continuation of transactions along the payment route, serving as a fundamental component for several consensus algorithms.

The detailed discussion around the efficiency and necessity of specific blockchain functionalities like timestamping and proof-of-publication not only sheds light on the evolving landscape of blockchain technology but also points to the ongoing need for education and development of tools that cater to the nuanced demands of users. For more insights into the intricacies of blockchain technology and its applications, Peter Todd's work offers valuable resources, accessible here.