Direct proof of use
The GBU-35 BLU-110 JDAM is directly documented in the 2003 Iraq War through U.S. Central Command Air Forces' Operation Iraqi Freedom air-campaign accounting. The 30 April 2003 report listed 675 GBU-35 JDAMs under guided munitions expended during the campaign period it measured.
Human Rights Watch's Off Target appendix independently reproduced the same air-war weapons table and identified the GBU-35 as a 1,000-pound GPS-guided JDAM, also listing 675 used in Iraq.
Sources: USCENTAF OIF By The Numbers, HRW Off Target Appendix D
Timeline
The USCENTAF report defined its data window as 0300Z on 19 March 2003 through 0259Z on 18 April 2003, covering the opening air campaign. Within that window, the report recorded 19,948 guided munitions and counted the GBU-35 JDAM alongside other JDAM variants.
By 11 December 2003, Human Rights Watch had published Off Target, using the same Operation Iraqi Freedom air-war munitions accounting in its appendix on weapons used in the air war.
Sources: USCENTAF OIF By The Numbers, HRW Off Target Appendix D
Narrative
The GBU-35 was part of the JDAM family of GPS-aided inertial guided air-to-surface weapons. Navy JDAM reference material describes the 1,000-pound MK 83/BLU-110 payload class and notes more than 6,000 JDAM expenditures in Operation Iraqi Freedom, while the USCENTAF table breaks out the GBU-35 count within the guided-munition totals.
The available public sources support aggregate use rather than individual strike attribution. They show that U.S. forces used the GBU-35 as an air-delivered precision strike munition in the opening Iraq campaign, but they do not identify specific aircraft, targets, locations, or battle-damage outcomes for the 675 GBU-35 rounds.
Sources: USCENTAF OIF By The Numbers, Navy JDAM Fact File, Designation Systems JDAM page