Do you ever reference other works such as blogs or wikis or websites in your works? Most of us do from time to time.
Copyright law requires that you cite references in your works derived from other's works. These references are typically accomplished in the bibliography in printed works. What about digital or online works? How do you reference online works? You can't use a URL - these change too frequently.
This is where ESBN IDs can help! Simply add the referenced work's ESBN ID to your article or content immediately following the quotation. There isn't a standard format for this yet but you can try "Reference ESBN xxxx..." where the ESBN ID is the referenced work. To Even do a bigger favor to the original author, you could add the verification link around their ID so that other readers can easily click the referenced ESBN ID and link back to the ESBN.ORG verification page.