User-agent: Digimarc Marcspider 
Disallow: / 

User-agent: bigdaddy.digimarc.com 
Disallow: / 

User-agent: * 
Disallow: /_db_backups/ 
Disallow: /img/ 
Disallow: /scr/ 
Disallow: /stats/
Disallow: /sty/ 
Disallow: /test/