Please note: The parity CI used a patched version (newer rustc) of srtool. Martin from Parity kindly submitted a PR to my repo. I am testing right now and will push and publish as soon as I can confirm. So in the end, you may use srtool from the paritytech/srtool or the chevdor/srtool image as you wish.

If you currently run srtool with the latest image from my repo (with RUSTC_VERSION=nightly-2020-07-20), you will NOT find the same hash.

Parity used (RUSTC_VERSION=nightly-2020-10-27)

I confirm the proposal hash:

✨ Your Substrate WASM Runtime is ready! ✨
Summary:
  Generator  : srtool v0.9.5
  GIT commit : 2f84569930a4ae86a3ecd60fff3488753ab79aa6
  GIT tag    : v0.8.27
  GIT branch : heads/v0.8.27
  Time       : 2021-01-11T18:51:48Z
  Rustc      : rustc 1.49.0-nightly (fd542592f 2020-10-26)
  Size       : 2164 KB (2216843 bytes)
  Content    : 0x0061736d010000000185033560037f7f...3539326620323032302d31302d323629
  Package    : kusama-runtime
  Proposal   : 0x81b7cd44dd13d4b32f57d5c5cbae56d52b7557dde760a57fc27e3e7302b025d6
  SHA256     : f64b8bfcaf209896731f6bbb2d886796a3056f868190ba8b5935227def5055a5
  Wasm       : ./target/srtool/release/wbuild/kusama-runtime/kusama_runtime.compact.wasm