score:2
There's no such thing as a "receipt for concurrent H1b". The concurrent H1b application is just an H1b application, but the terms of employment should explicitly call out that this is a part-time position in addition and not instead of the other H1b full time position (it should be explicitly checked on the I-129, Part 2 Question 2, checkbox d).
I don't believe there's anything mentioned to that on the I-797C for the petition. You can ask for the copies of the petition and the LCA submitted to check how the position is defined.