- Cover
- Prime Response Solid
- Factory finish
- 500/2000 Siaair
- Color
- Black / Gray
- Core (15 lb)
- ProofDynamiCore
- R.G. / Differential / Bias
16 lb 2.506 0.052 0.020 15 lb 2.519 0.052 0.020 14 lb 2.538 0.052 0.020 13 lb 2.589 0.043 0.011 12 lb 2.612 0.043 0.011 - Release date
- March 19, 2020
- Balls with the same cover
- These balls have the same Prime Response Solid cover as the Proof:
- Balls with the same core
- These balls have the same 15-lb Proof core as the Proof:
- From the manufacturer
The Proof is a new upper mid performance release with possibly the strongest core numbers ever in this category and an updated Prime cover that will get Track Bowling fans excited. The Proof is very strong and continuous and surprised our testers because it is usable for a long time and does not seem to want to quit, despite the strong core, cover, and finish combination.
| Name | Core (15 lb) | Released | |
 | Legion Solid (2022) Track | LT-2 asymmetric | Oct 21, 2022 |
| Name | Cover | Released | |
 | Proof Hybrid Track | Prime Response Hybrid | Jan 14, 2021 |
 | Proof Pearl Track | Prime Response Pearl | Sep 3, 2020 |