Our research aims to understand past changes in climate and ocean conditions by analyzing fossilized lipids and calcite microfossils found in marine sediments covering the seafloor. These fossils serve as proxies for climate conditions beyond the instrumental era. We focus on proxies used to derive seawater temperature, often referred to as paleothermometers. Since the proxy recordings of climate signals are indirect, we strive to improve the interpretation of proxy data, enhancing their reproducibility and enabling inter-comparison between different proxies. Our goal is to provide better constraints for proxy-derived climate reconstructions, which, in turn, help refine the numerical models used to project future climate change.