The Hague-based International Criminal Court in March issued an arrest warrant for Putin, accusing him of unlawfully deporting Ukrainian children.
The register of damage, also to be lodged in The Hague, with a satellite office in Ukraine, will detail war-time claims of harm and destruction wrought by Russia.
Initially established for three years, “It paves the way towards a future international comprehensive compensation mechanism for the victims of the Russian aggression,” a Council of Europe statement said.
UKRAINE PRESSES FOR JETS
“It’s important to give a message to people who have damages that we will not forget them, and that we will follow up afterwards,” Belgian Prime Minister Alexander De Croo said.
The move by the wider European community highlighted Russia’s isolation on the continent.
It also came just after Zelenskyy wrapped up a whirlwind tour of major European capitals that saw Germany, France and Britain all vow to step up arms deliveries to Ukraine.
Ukraine is believed to be preparing an offensive on Russian positions in the east of its territory to be launched within weeks.
Zelenskyy is intent on boosting air defences as Russia deploys missiles and drones to inflict long-range damage.
He is pressing Western allies to provide advanced fighter jets but they are wary, fearing it could escalate the war.
British Prime Minister Rishi Sunak and Dutch counterpart Mark Rutte agreed on the first day of the summit that they would build an “international coalition to provide Ukraine with combat air capabilities, supporting with everything from training to procuring F-16 jets”.