The San Francisco Examiner is in the newspapers.com database, and, from what I've been able to piece together there:
Claim To Fame appears to have started its run in April of 1987, and I've found no evidence of any run prior to that. It continued to September of 1988 as a Saturdays at 6:30 program, and then aired for about a month in February and March of 1989 at 12:30 weekdays (probably, but not definitively, as reruns of the 1987-1988 episodes rather than as a new production).
The Examiner of 4/3/1987 has some useful information as it relates to Sid Marsh, including that he was hired by Bob Klein (the executive producer of the program) after it had already shot a pilot. The article also indicates that he hadn't been active in local San Francisco television, going from working for Ralph Edwards to Chuck Barris, and as having served as a writer/producer for Love Connection during the three previous years.
Interestingly, the Mal Sharpe lawsuit does not appear to have made the Examiner- the references I've found for him from the period are chiefly in the context of several TV specials he did locally, but with nothing connecting him to a game show.
I hope this information has some value- it does seem to indicate that the program wasn't Claim To Fame, but I haven't spotted anything suggesting what it could be.