First off, since you found the coin 6 inches deep in an old Park, it is quite possibly genuine! However, there is always the possibility that it is a fake, not counterfeit, a fake! In that I mean, that someone cut down a 1944 Copper Cent to fit inside the rim of a milled out 1943 Steel Cent (like a Magician's coin but without being Heads-Heads or Tail-Tails), then Zinc coated the coin, especially the Obverse or front to look like an authentic 1944 Steel Cent. If it is a genuine Steel Cent, then it should stick solid to a regular magnet. Also, if there is peeling of the Zinc on the Obverse, check to see if any Copper is showing through. If so, then it is probably a magician's coin and once cleaned, one might be able to see the seam just inside of the Obverse rim where the cut down 1943 Copper Cent fits into. I would recommend soaking the coin in Mineral Oil for a few days, then lightly rub it between your' fingers while rinsing under hot water. After that, pat it dry (do not rub) and take close-up pics of the Obverse (front) and Reverse (back) and post them here. If it is determined that it is highly likely that the coin is a genuine 1944 (no mint mark for Philadelphia or a "D" mint mark for Denver) Steel Cent, then contact Coin Dealers in your area until you find a Dealer that is a member of PCGS (Professional Coin Grading Service) and contract with the Coin Dealer to send the coin to PCGS for authentication and if genuine to have it certified, graded and holdered in a PCGS Holder. Make sure to take lots of pictures of the coin for evidence in any claim of loss or stolen, get a signed receipt from the Coin Dealer where he took possession of the coin and what it is and make sure that he or she sends the coin to PCGS via Priority/Registered Mail with enough Insurance to cover the estimated value of the coin. The Coin Dealer can keep tabs on the process of authentication, certification and grading and if the analysis is that it is genuine, he can have PCGS send the coin to a large Coin Auction House such as Heritage Auctions or Stacks Bowers, then you just wait for it to sell and you get your cut. There will be fees to pay the Coin Auction Company plus the fee that must be paid to the Coin Dealer in which you can include in the contract before hand that any and all fees for sending the coin the PCGS and any fees paid to them for their' services and sending the coin to the Coin Auction House, is to be paid by the Coin Dealer. However, the Coin Dealer might want any fees for sending the coin to PCGS and their' services rendered, upfront. If this is the case, then once you receive your' cut from the Coin Auction House, you will only have to pay him or her the agreed upon fee that is due them!
Added: Of course if you don't trust or don't want to deal with and pay a Coin Dealer to send the coin to PCGS, then you can subscribe to PCGS as a member and send the coin to them yourself.
I hope that the coin is authentic and you get one heck of a windfall! In the meantime, please try to get us some pics as soon as the coin has been cleaned up by the method I stated above.
Frank