If I understand correctly, this is an old spruce.
Your mushrooms are similar in appearance to the bordered tinder fungus (fomitopsis pinicola). But in appearance in the photo it is difficult to draw a final conclusion. You may be right.
Nice find. If you find young mushrooms, chop and dry. You can make both alcohol and water tincture (not higher than +50 C). Good for immunity, against viruses and bacteria and many more useful properties .. Just do not pick mushrooms in the city and nearby :)