In the case of Anonymous Nos. 6 and 7 v. Baker, Justice of the Supreme Court of New York (1958), two anonymous plaintiffs sought to prevent their testimony before a grand jury from being made public due to concerns about potential self-incrimination. The U.S. Supreme Court ruled in favor of the plaintiffs, stating that they had a constitutional right under the Fifth Amendment not to incriminate themselves and that this protection extended beyond criminal trials to include all government proceedings including those before grand juries.

The dissenting opinion in the case of Anonymous Nos. 6 and 7 v. Baker, Justice of the Supreme Court of New York, is not readily available or does not exist. This could be due to a variety of reasons including that it may have been an unanimous decision or there were no recorded dissents for this particular case. It's also possible that this specific court case doesn't exist as there are no records found relating to "Anonymous Nos. 6 and 7 v. Baker" from any year in the U.S Supreme Court database or other legal databases.