Hi wdvps,
here is my understanding of Eurozone QE.
Normally speaking, the central bank will dump cash to absorb governmental debts (bond), and normally at premium, which makes the assets bigger.
For your requirement,
here is the links you may be interested in.
https://www.ecb.europa.eu/stats/ ... ounts_index.en.html
http://www.ecb.europa.eu/stats/html/index.en.html