SUMMARY
***
At the moment the bingprovider retrieves the title from the node title from the JSON from https://www.bing.com/HPImageArchive.aspx?forma This node title has always the text "Info".
The code for the bingprovide already retrieves the title from the copyright, but checks if the Title node is empty. I think by removing lines 75 to 78 will fix this issue.

This way we will respect the full credentials from the author of the photo.
***

In bingprovider.cpp

from line 65. 
´        // Parse the title and the copyright text from the json data
        // Example copyright text: "草丛中的母狮和它的幼崽，南非 (© Andrew Coleman/Getty Images)"
        const QString copyright = imageObject.value(QStringLiteral("copyright")).toString();
        const QRegularExpression copyrightRegEx(QStringLiteral("(.+?)[\\(（](.+?)[\\)）]"));
        if (const QRegularExpressionMatch match = copyrightRegEx.match(copyright); match.hasMatch()) {
            // In some regions "title" is empty, so extract the title from the copyright text.
            m_title = match.captured(1).trimmed();
            m_author = match.captured(2).remove(QStringLiteral("©")).trimmed();
        }

        const QString title = imageObject.value(QStringLiteral("title")).toString();
        if (!title.isEmpty()) {
            m_title = title;
        }