[gamblor956]

No, the law, and more importantly, the guilds (here, the SGA and SCL), are quite strict on these points.

A producer cannot "negotiate" creative credit if they did not earn it, because the guilds will not allow it.

If a producer wants writing credit, they must earn the writing credit by performing creative activities as specified by the guild rules. Project management and other "producing" activities do not count. Note however that the creative contributions of session musicians under WFH arrangements are generally attributed to their employer--i.e., to the producer, and SCL rules generally apply to determine the creative contribution the producer may claim for the work of session musicians.

Co-writing and arranging are not "producing" activities, they are writing and composition activities which can qualify for songwriting and composing credit. Few producers participate creatively in their songs, but the ones that do tend to be the more famous ones (like Dr. Dre, Jay-Z, Dr. Luke, etc.) and are use usually artists in their own right.