MzTee, I think you have to accept that the noise from you dog as well as your neighbour’s dog, probably, is actually annoying this neighbour which is not fair at all.
You really should do something more about it than just asking her for ‘evidence’.
Do you really think it’s likely this neighbour ‘has it in for you’ or something? Treating her complaint as simply frivolous is rather inconsiderate of you. Offer her an olive branch and sort this out.
Anyhow keeping dogs (or cats for that matter) in apartments is cruel to the animals themselves as well as the neighbours and self-indulgent of you. Get a free-standing house with a yard.