constatar
transitive verb
1 (confirmar)
estos datos constatan la existencia de vida en el planeta this data proves the existence of life on the planet; la autopsia constata que fue un ataque al corazón the post mortem confirms that it was a heart attack; pude constatar que era verdad I was able to establish that it was true
yo mismo pude constatar su calidad I was able to see the quality of it for myself