As concerns the title "Verbs", if what you have to consign to paper as relates to verbs is a systematic recording of some of their features that you are interested in, then "Les verbes" is a good title, but it is not precise: it means "My (personal) notes about verbs" (but you only will know that when you read the title, if that doesn't happen 40 years after the last note, when you might barely remember); if you intend to avail yourself of a comprehensive record, then it is a perfect title.
"Des verbes" can be ambiguous. First, it must be understood that in ages gone by, writers used to write titles of that sort, in which "de" is not the partitive article but instead the preposition meaning "about, on". It would be rendered by "on" in English (On verbs). Whether in French or in English this usage has gone mostly "out of fashion" and it is reserved preferably, in any case, for works of a certain importance, even if their aim is far from exhausting the subject; however, there are still writers keeping this usage alive. So, if you have a mind to use such traditional forms and that you intend to couch your particular thoughts and remarks about verbs you do have a perfect title. Unfortuately, it is ambiguous because "des" can be interpreted as the partitive article, and, taken as such, it says that you are merely collecting some ideas about certain verbs. You have to be more specific in order to avoid this incertitude, which will be cleared out in the reader's mind only after an investigation of the content. For instance, then, you can use the title "De la grammaire des verbes" (recalling usage: important, not used much nowadays).