Did you purchase the coin funded or unfunded? I ask because I bought an unfunded 1BTC with a COA that matched the 8-character address on the coin, but was also provided a different address on the bill of sale by the 3rd party vendor. Sounds similar, but not directly purchased from Titan Tim.
5cTKWpFQ is the public address on the coin.
So when entering these firstbits on walletexplorer.com the "pattern 5cTKWpFQ is not recognized" and when entering the firstbits at https://www.titanbtc.com/verify/ the funded amount is 0.0BTC. I recall that things were pretty scattered toward the end at Titan, and he was selling gold coins for spot without holograms (though I believe at one point he was thinking of selling whatever stock he had left funded, but was called out by member/owners for diluting the scarcity with that action). That said, have you tried entering the firstbits of the alternate address provided on either of these sites to get more funding info? That might help you make the painful decision to peel or not...
Those are not "first-bits".
Titan just used random characters for the holograms.
To my knowledge, only the 2017 coins have the actual first bits as their "code"