Thinking about this I came up with the following. I tried getting the fingerprint in full but only got the short version. Not being a gpg-ninja it would suffice to make an offline version of the add command.

key="$(echo "-----BEGIN PGP PUBLIC KEY BLOCK-----||mQINBFit2ioBEADhWpZ8/wvZ6hUTiXOwQHXMAlaFHcPH9hAtr4F1y2+OYdbtMuth|lqqwp028AqyY+PRfVMtSYMbjuQuu5byyKR01BbqYhuS3jtqQmljZ/bJvXqnmiVXh|38UuLa+z077PxyxQhu5BbqntTPQMfiyqEiU+BKbq2WmANUKQf+1AmZY/IruOXbnq|L4C1+gJ8vfmXQt99npCaxEjaNRVYfOS8QcixNzHUYnb6emjlANyEVlZzeqo7XKl7|UrwV5inawTSzWNvtjEjj4nJL8NsLwscpLPQUhTQ+7BbQXAwAmeHCUTQIvvWXqw0N|cmhh4HgeQscQHYgOJjjDVfoY5MucvglbIgCqfzAHW9jxmRL4qbMZj+b1XoePEtht|ku4bIQN1X5P07fNWzlgaRL5Z4POXDDZTlIQ/El58j9kp4bnWRCJW0lya+f8ocodo|vZZ+Doi+fy4D5ZGrL4XEcIQP/Lv5uFyf+kQtl/94VFYVJOleAv8W92KdgDkhTcTD|G7c0tIkVEKNUq48b3aQ64NOZQW7fVjfoKwEZdOqPE72Pa45jrZzvUFxSpdiNk2tZ|XYukHjlxxEgBdC/J3cMMNRE1F4NCA3ApfV1Y7/hTeOnmDuDYwr9/obA8t016Yljj|q5rdkywPf4JF8mXUW5eCN1vAFHxeg9ZWemhBtQmGxXnw9M+z6hWwc6ahmwARAQAB|tCtEb2NrZXIgUmVsZWFzZSAoQ0UgZGViKSA8ZG9ja2VyQGRvY2tlci5jb20+iQI3|BBMBCgAhBQJYrefAAhsvBQsJCAcDBRUKCQgLBRYCAwEAAh4BAheAAAoJEI2BgDwO|v82IsskP/iQZo68flDQmNvn8X5XTd6RRaUH33kXYXquT6NkHJciS7E2gTJmqvMqd|tI4mNYHCSEYxI5qrcYV5YqX9P6+Ko+vozo4nseUQLPH/ATQ4qL0Zok+1jkag3Lgk|jonyUf9bwtWxFp05HC3GMHPhhcUSexCxQLQvnFWXD2sWLKivHp2fT8QbRGeZ+d3m|6fqcd5Fu7pxsqm0EUDK5NL+nPIgYhN+auTrhgzhK1CShfGccM/wfRlei9Utz6p9P|XRKIlWnXtT4qNGZNTN0tR+NLG/6Bqd8OYBaFAUcue/w1VW6JQ2VGYZHnZu9S8LMc|FYBa5Ig9PxwGQOgq6RDKDbV+PqTQT5EFMeR1mrjckk4DQJjbxeMZbiNMG5kGECA8|g383P3elhn03WGbEEa4MNc3Z4+7c236QI3xWJfNPdUbXRaAwhy/6rTSFbzwKB0Jm|ebwzQfwjQY6f55MiI/RqDCyuPj3r3jyVRkK86pQKBAJwFHyqj9KaKXMZjfVnowLh|9svIGfNbGHpucATqREvUHuQbNnqkCx8VVhtYkhDb9fEP2xBu5VvHbR+3nfVhMut5|G34Ct5RS7Jt6LIfFdtcn8CaSas/l1HbiGeRgc70X/9aYx/V/CEJv0lIe8gP6uDoW|FPIZ7d6vH+Vro6xuWEGiuMaiznap2KhZmpkgfupyFmplh0s6knymuQINBFit2ioB|EADneL9S9m4vhU3blaRjVUUyJ7b/qTjcSylvCH5XUE6R2k+ckEZjfAMZPLpO+/tF|M2JIJMD4SifKuS3xck9KtZGCufGmcwiLQRzeHF7vJUKrLD5RTkNi23ydvWZgPjtx|Q+DTT1Zcn7BrQFY6FgnRoUVIxwtdw1bMY/89rsFgS5wwuMESd3Q2RYgb7EOFOpnu|w6da7WakWf4IhnF5nsNYGDVaIHzpiqCl+uTbf1epCjrOlIzkZ3Z3Yk5CM/TiFzPk|z2lLz89cpD8U+NtCsfagWWfjd2U3jDapgH+7nQnCEWpROtzaKHG6lA3pXdix5zG8|eRc6/0IbUSWvfjKxLLPfNeCS2pCL3IeEI5nothEEYdQH6szpLog79xB9dVnJyKJb|VfxXnseoYqVrRz2VVbUI5Blwm6B40E3eGVfUQWiux54DspyVMMk41Mx7QJ3iynIa|1N4ZAqVMAEruyXTRTxc9XW0tYhDMA/1GYvz0EmFpm8LzTHA6sFVtPm/ZlNCX6P1X|zJwrv7DSQKD6GGlBQUX+OeEJ8tTkkf8QTJSPUdh8P8YxDFS5EOGAvhhpMBYD42kQ|pqXjEC+XcycTvGI7impgv9PDY1RCC1zkBjKPa120rNhv/hkVk/YhuGoajoHyy4h7|ZQopdcMtpN2dgmhEegny9JCSwxfQmQ0zK0g7m6SHiKMwjwARAQABiQQ+BBgBCAAJ|BQJYrdoqAhsCAikJEI2BgDwOv82IwV0gBBkBCAAGBQJYrdoqAAoJEH6gqcPyc/zY|1WAP/2wJ+R0gE6qsce3rjaIz58PJmc8goKrir5hnElWhPgbq7cYIsW5qiFyLhkdp|YcMmhD9mRiPpQn6Ya2w3e3B8zfIVKipbMBnke/ytZ9M7qHmDCcjoiSmwEXN3wKYI|mD9VHONsl/CG1rU9Isw1jtB5g1YxuBA7M/m36XN6x2u+NtNMDB9P56yc4gfsZVES|KA9v+yY2/l45L8d/WUkUi0YXomn6hyBGI7JrBLq0CX37GEYP6O9rrKipfz73XfO7|JIGzOKZlljb/D9RX/g7nRbCn+3EtH7xnk+TK/50euEKw8SMUg147sJTcpQmv6UzZ|cM4JgL0HbHVCojV4C/plELwMddALOFeYQzTif6sMRPf+3DSj8frbInjChC3yOLy0|6br92KFom17EIj2CAcoeq7UPhi2oouYBwPxh5ytdehJkoo+sN7RIWua6P2WSmon5|U888cSylXC0+ADFdgLX9K2zrDVYUG1vo8CX0vzxFBaHwN6Px26fhIT1/hYUHQR1z|VfNDcyQmXqkOnZvvoMfz/Q0s9BhFJ/zU6AgQbIZE/hm1spsfgvtsD1frZfygXJ9f|irP+MSAI80xHSf91qSRZOj4Pl3ZJNbq4yYxv0b1pkMqeGdjdCYhLU+LZ4wbQmpCk|SVe2prlLureigXtmZfkqevRz7FrIZiu9ky8wnCAPwC7/zmS18rgP/17bOtL4/iIz|QhxAAoAMWVrGyJivSkjhSGx1uCojsWfsTAm11P7jsruIL61ZzMUVE2aM3Pmj5G+W|9AcZ58Em+1WsVnAXdUR//bMmhyr8wL/G1YO1V3JEJTRdxsSxdYa4deGBBY/Adpsw|24jxhOJR+lsJpqIUeb999+R8euDhRHG9eFO7DRu6weatUJ6suupoDTRWtr/4yGqe|dKxV3qQhNLSnaAzqW/1nA3iUB4k7kCaKZxhdhDbClf9P37qaRW467BLCVO/coL3y|Vm50dwdrNtKpMBh3ZpbB1uJvgi9mXtyBOMJ3v8RZeDzFiG8HdCtg9RvIt/AIFoHR|H3S+U79NT6i0KPzLImDfs8T7RlpyuMc4Ufs8ggyg9v3Ae6cN3eQyxcK3w0cbBwsh|/nQNfsA6uu+9H7NhbehBMhYnpNZyrHzCmzyXkauwRAqoCbGCNykTRwsur9gS41TQ|M8ssD1jFheOJf3hODnkKU+HKjvMROl1DK7zdmLdNzA1cvtZH/nCC9KPj1z8QC47S|xx+dTZSx4ONAhwbS/LN3PoKtn8LPjY9NP9uDWI+TWYquS2U+KHDrBDlsgozDbs/O|jCxcpDzNmXpWQHEtHU7649OXHP7UeNST1mCUCH5qdank0V1iejF6/CfTFU4MfcrG|YT90qFF93M3v01BbxP+EIY2/9tiIPbrd|=0YYh|-----END PGP PUBLIC KEY BLOCK-----|" | tr '|' '\n')";shasum="c0c3cb1cf3161419daabebaa8632dd714b9a8dda"; [ "$shasum" == "$(echo "$key" | gpg --with-colons | shasum | cut -d ' ' -f 1)" ] && echo "$key" | apt-key add -

Turns out that I could not compress the public key to make it shorter either.