link-titles-to-doi.tex

\usepackage[style=authoryear, url=false, doi=false]{biblatex}

% make the title link to the DOI, if available: 
\newbibmacro{string+doi}[1]{%
  \iffieldundef{doi}{#1}{\href{https://doi.org/\thefield{doi}}{#1}}}
\DeclareFieldFormat{title}{\usebibmacro{string+doi}{\mkbibemph{#1}}}
\DeclareFieldFormat[article]{title}{\usebibmacro{string+doi}{\mkbibquote{#1}}}