So where exactly is the proof? This is just an article citing a professor (not a turkish official) who says that armenians killed turks, no links to the direct source of his claims, no official statement by the turkish state, and no recognition of it anywhere in the world, you need to rethink your definition of "proof" because that's not it.
My turn tho.
As of April 2019, 30 states had officially recognized the historical events as genocide, those are: Argentina, Armenia, Austria, Belgium, Bolivia, Brazil, Bulgaria, Canada, Chile, Cyprus, Czech republic, France, Germany, Greece, Italy, Libya, Lithuania, Lebanon, Luxembourg, Netherlands, Paraguay, Poland, Russia, Slovakia, Sweden, Switzerland, Syria, Uruguay, Holy See, Venezuela and 49 out of 50 states of USA.
Other than that are numerous states, regions, provinces, municipalities and parliamentary committees:
Parliaments of 2 Australian states, new south wales and south australia, also City of Ryde and City of Willoughby, President of Egypt, Teheran regional government and unoficially the Islamic Republic of Iran, Knesset's Education, Culture and Sports Committee, Parliaments of 5 Spanish regions (Aragon, Balearic Islands, Basque Country, Catalonia, Navarre), additionally 32 cities within 8 regions, and also Crimea.
The verdict of the Turkish courts-martial of 1919–20 acknowledged the massacre of Armenians as "war crimes", and sentenced the perpetrators to death. However, in 1921, during the resurgence of the Turkish National Movement, amnesty was given to those found guilty. Thereafter, the successive Turkish government, under Mustafa Kemal Atatürk, adopted a policy of denial.
In April 2006, the Turkish Human Rights Association recognized the events as a genocide.
On May 15, 1948, the Economic and Social Council presented a 384-pages report prepared by the United Nations War Crimes Commission, set up in London (October 1943) to collect and collate information on war crimes and war criminals.The report is highly topical in regard to the Armenian Genocide, not only because it uses the 1915 events as a historic example, but also as a precedent to the Articles 6 (c) and 5 (c) of the Nuremberg and Tokyo Charters. The report entitled "Information Concerning Human Rights Arising from Trials of War Criminals" used the Armenian case as a vivid example of committed crimes by a state against its own citizens.
In 1985, the United Nations Sub-Commission on Prevention of Discrimination and Protection of Minorities received a report from Special Rapporteur and Sub-Commission member Benjamin Whitaker (United Kingdom) entitled Revised and Updated Report on the Question of the Prevention and Punishment of the Crime of Genocide (commonly known as The Whitaker Report), in which the Ottoman systematic massacre of Armenians during World War I was cited as meeting the criteria for the UN definition of genocide and as one of the genocides of the 20th century.
In 1997 the International Association of Genocide Scholars (IAGS) passed a resolution unanimously recognizing the Ottoman massacres of Armenians as genocide.
In February 2002 an independent legal opinion commissioned by the International Center for Transitional Justice, concluded that the Ottoman massacre of Armenians in 1915–1918 "include[d] all of the elements of the crime of genocide as defined in the [Genocide] Convention, and legal scholars as well as historians, politicians, journalists and other people would be justified in continuing to so describe them".
In 2007 the Elie Wiesel Foundation for Humanity wrote a letter signed by 53 Nobel Laureates re-affirming the Genocide Scholars' conclusion that the 1915 killings of Armenians constituted genocide.
On April 15, 2015, the European Parliament backed a motion that calls the massacre a century ago of up to 1.5 million Armenians by Ottoman Turkish forces a genocide, days after Pope Francis' message triggered an angry reaction in Turkey for using the same term. It had previously done so in 1987, 2000, 2002 and 2005.
The Council of Europe recognized the Armenian Genocide on May 14, 2001.
On November 7, 1989 the Union for Reform Judaism passed a resolution on recognition of the Armenian Genocide.
In 2014 the American Jewish Committee recognized the Armenian Genocide as a historical fact.
The Central Council of Jews in Germany has called on the German government to recognize the World War I mass murder of over one million Armenians in what was then the Ottoman Empire as a genocide.
"One hundred years ago, the government of the Ottoman Empire ordered the deportation of one million Armenians. They were murdered directly, or died of starvation and dehydration in the desert," Central Council President Josef Schuster told the newspaper Der Tagesspiegel. He added: "These terrible events should be called what they were: a genocide."
Schuster said the Armenian genocide later served Adolf Hitler and his Nazis as a blueprint for the Holocaust.