You need to contact a lawyer right away, even if you intend to comply with the takedown notice. If you don't have one, take @pinball's advice and contact the EFF.
The best time to have talked to a lawyer was immediately after receiving the notice, before you did anything, including posting on Cohost. The second best time is right now. As in, stop reading this right now and immediately seek legal help.
Of all the advice on the actual law, @Colgate is the closest here, but the advice is also completely irrelevant. Even if the law is on your side, the only way to win a legal argument is in court, and you do not want to go to court over this. Litigation is costly and time-consuming. It becomes your life. It drains you, even if you win.
The lawyer at LexusNexus who drafted this notice does not care whether or not TCRF is infringing. They've been hired to protect a brand, and they have no responsibility to ensure that the notice is likely to survive a legal challenge before sending it. In fact, they can file a lawsuit against you even if it is entirely without merit. There's nothing stopping them.
They are experts in the American legal system, meaning they can pull its levers to cause you pain, purely at their whims. The only way to protect yourself is to get someone on your side who can pull those same levers.
If you contact them trying to explain it's not infringing, all you are doing is painting a target on your back, telling them that you were dumb enough not to hire an attorney. It makes it extremely easy for them to threaten you with a lawsuit and pressure you to settle. Again, even if you would win the suit, it would cost you more to fight it than to settle. LexusNexus isn't going to complain about a staff lawyer bringing in a few thousand dollars off the back of a fraudulent legal claim.
This is why it's best to get a lawyer even if you intend to comply with the notice. You don't want them thinking you're an easy target.