Cyril Whistler from Arnhem, the Netherlands, has spent the last two years studying the music sheet titled "Marsch Impromptu," by composer Gottfried Federlein.
The score is believed to be the key to a cache of lost gold and diamonds belonging to the Nazi leader and buried somewhere in Mittenwald, Germany.
It is thought the marks and typewritten comments above each line of music were added by Hitler's private secretary Martin Bormann as clues to the whereabouts of the so-called 'Tears of the Wolf'.
Whistler now says that the treasure is buried behind the barbed wire of a German army depot in Mittenwald.
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Dutch filmmaker Leon Giesen has made three excavations around the town but Whistler believes he now has the spot "to the centimetre".
Whistler studied the score and claims to have discovered a typical number that returns over and over again, between the bars as well as encrypted throughout the score.
"The more I studied the piece, the more I discovered. The letters, the number and the signs reveal a route," he said.
The haul is believed to contain 100 gold bars and a huge stash of Hitler's diamonds.
Nazi elite hid fortunes across Germany as the Third Reich collapsed, to finance a post-war resistance or an escape.
It is believed that Hitler ordered Bormann to bury the haul in the Bavarian hills during the Third Reich's final days.
Bormann is said to have scribbled the location's coordinates on the sheet music to send to the Nazis' accountant.