We can use refsegment instead of refsection (read about refsection and refsegment in the biblatex documentation §3.6.5 Bibliography Sections & §3.6.6 Bibliography Segments, pp. 78-79).
Instead of refsection=chapter we pass refsegment=chapter to biblatex, we also issue defernumbers=true (you can find out more about defernumbers on p. 53 of the doc).
We then have to specify the segment in the per-chapter bib manually, but this can be automated with \therefsegment, so the chapter-bibliographies are
\printbibliography[segment=\therefsegment,heading=subbibliography]
The full end-document bib is created by
\printbibliography
MWE
\documentclass{book}
\usepackage[backend=biber,
bibencoding=utf8,
refsegment=chapter,
style=numeric,
firstinits=true,
isbn=false,
doi=true,
url=false,
clearlang=true,
defernumbers=true,
]{biblatex}
\addbibresource{biblatex-examples.bib}
\begin{document}
\tableofcontents
\chapter{Ch 1}
A citation \cite{wilde}.
\printbibliography[segment=\therefsegment,heading=subbibliography]
\chapter{Ch 2}
And another one \cite{cicero}.
\printbibliography[segment=\therefsegment,heading=subbibliography]
\printbibliography
\end{document}

numericstyle that is a very dangerous idea indeed. There will be a [1] in chapter 1 and a [1] in chapter 2, but they might not necessarily be the same work. What is [1] supposed to be in the cumulative bibliography? – moewe Sep 03 '14 at 15:25