Explanation

According to the Global Investment Performance Standards (GIPS), verification is an independent review of a firm's claim of compliance with the GIPS standards. The key requirements are:

1. Verification must be performed by an independent third party - This ensures objectivity and impartiality in assessing compliance.

2. CFA Institute does not perform verifications - While CFA Institute sponsors and maintains the GIPS standards, it does not conduct verifications of individual firms.

3. Internal auditors cannot perform verification - Internal auditors are not considered independent because they are employees of the firm, which creates a conflict of interest.

4. Independent third-party consultants are qualified - These are external professionals who can provide an objective assessment of a firm's compliance with GIPS standards.

Therefore, only an independent third-party consultant can perform verification of a firm's claim of compliance with the GIPS standards.