A Kurdish source working with the Americans had brought al-Baghdadi's underwear to conduct a DNA test and make sure that the person in question was al-Baghdadi himself.
The death of the reclusive terrorist leader during a US raid in Syria is the culmination of years of setbacks and losses for the once powerful group.
Authorities are investigating radicalised Kazakh citizens' activities in war zones and strengthening counter-terrorism efforts across the country.
The unanimous resolution shows the international unity supporting the need to secure IS detainees in Syria.
The repatriation is the latest by Central Asian countries for their citizens in the Middle East.
Observers say Abu Bakr al-Baghdadi could pay a high price for nominating Abu Abdullah Qardash, as the move likely demonstrates the IS leader's distrust of his other commanders.
The public should know about terrorist activities in the country and across the region to be prepared for possible risks, say specialists.
One of the key causes of radicalisation is a sense of injustice, researchers say.
With parks, saunas and churches, Russian soldiers are set to stay in Syria indefinitely, all the while many Syrians face what could be the century's worst humanitarian crisis.
International and Kurdish authorities have repeatedly called for the foreigners they hold -- including orphans -- to be repatriated, a request that largely has encountered resistance.