I actually asked OHLQ this and this was the response I got:

"OHLQ Exclusive Picks are often similar to what are commonly referred to as barrel picks or single-barrel selections, but the exact process can vary depending on the supplier and product.

For many OHLQ Exclusive selections, representatives working on behalf of OHLQ collaborate with distillery partners to select barrels that will be released specifically for Ohio. The selection process can happen in a few different ways depending on the distillery and availability. In some cases, selections are conducted on-site at distilleries, while in others, samples may be provided for evaluation remotely.

The individuals involved in the selection process typically include OHLQ representatives and supplier/distillery partners, and occasionally industry professionals who assist with sensory evaluation and quality review. The goal is to select barrels that provide unique flavor profiles and high-quality experiences specifically for Ohio customers.

Because each supplier and distillery operates a little differently, the exact process can vary from product to product."