DFINITY Foundation

ICDevs.org

CryptoIsGood

Anvil

ICPL.app

ysyms

The Accumulators’ Neuron

RawTech Venture

Paul Young

ICPMANUAL

8yeargangDAO

Isaac Valadez

Krzysztof Żelazko

Nicolas.ic

Smaug’s Neuron for Retail Investors

ICLight.io

Taggr Network

Sonic AMM

Rakeoff.io

OpenChat

ELNA AI

GEEKFACTORY

ICP Hub México

ICP Hub Poland

Jerry Banfield

WaterNeuron

ICP Hub Bulgaria

Gold DAO

NeuronPool

LORIMER ♾️ 🐶

B3Pay

ZenithCode

Aviate Labs

D-QUORUM

Yuku AI

CO.DELTA △

DragginCorp

CodeGov

Cosmicrafts

Synapse.vote (original)

Synapse.vote (NEW)

Arthur’s Neuron (used to be cycle_dao)

Inactive (Request Removal) - The Fools' Court

$STACK

Always Rejects

John Wiegley

# Proposal to upgrade the BTC Checker canister

Repository: `https://github.com/dfinity/ic.git`

Git hash: `bb6e758c739768ef6713f9f3be2df47884544900`

New compressed Wasm hash: `a90ed5c89939147cbb58a915343c114787d35835f33609c13be2d802c309b3d9`

Upgrade args hash: `0fee102bd16b053022b69f2c65fd5e2f41d150ce9c214ac8731cfaf496ebda4e`

Target canister: `oltsj-fqaaa-aaaar-qal5q-cai`

Previous BTC Checker proposal: https://dashboard.internetcomputer.org/proposal/136101

---

## Motivation

Update the Bitcoin checker canister to include the latest code changes, notably:

* Update the OFAC checklist.
* Avoid caching metrics to have more reliable alerts.

## Release Notes

```
git log --format='%C(auto) %h %s' eecacca6c05871f00e674dcc4bfcf548fa0c2f63..bb6e758c739768ef6713f9f3be2df47884544900 -- rs/bitcoin/checker
9c4e4500ea chore(ckbtc/cketh): update ckBTC/ckETH OFAC blocklists 05.2025 (#5203)
b0a3d6dc4c feat: Add "Cache-Control: no-store" to all canister /metrics endpoints (#5124)
830f4caa90 refactor: remove direct dependency on ic-cdk-macros (#5144)
2949c97ba3 chore: Revert ic-cdk to 0.17.2 (#5139)
d1dc4c2dc8 chore: Update Rust to 1.86.0 (#5059)
3490ef2a07 chore: bump the monorepo version of ic-cdk to 0.18.0 (#5005)
c2d5684360 refactor(ic): update imports from ic_canisters_http_types to newly published ic_http_types crate (#4866)
 ```

## Upgrade args

```
git fetch
git checkout bb6e758c739768ef6713f9f3be2df47884544900
didc encode '()' | xxd -r -p | sha256sum
```

## Wasm Verification

Verify that the hash of the gzipped WASM matches the proposed hash.

```
git fetch
git checkout bb6e758c739768ef6713f9f3be2df47884544900
"./ci/container/build-ic.sh" "--canisters"
sha256sum ./artifacts/canisters/ic-btc-checker.wasm.gz
```

Upgrade NNS Canister: oltsj-fqaaa-aaaar-qal5q-cai to wasm with hash: a90ed5c89939147cbb58a915343c114787d35835f33609c13be2d802c309b3d9