Upgrade frequency (per 90 days)

Circle USYC's assessment for RD-F-137 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

9 upgrades over 36 months on Ethereum USYC = approximately 1 upgrade per 4 months. BSC proxy has no upgrades since Nov 2025 deployment. In the last 90 days: 0 upgrades on either chain.

Sources #

Etherscan
USYC BSC proxy - no upgrades since launchBSCScan BSC proxy: No upgrade events matching supported EIPs foundretrieved 2026-05-16
Etherscan
USYC ETH proxy upgrade event historyUSYC ETH proxy events: 9 upgrades from block 17381914 May 2023 to block 23977326 Dec 2025retrieved 2026-05-16

Methodology #

Count the number of contract upgrades in the trailing 90 days via on-chain upgrade events.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol circle-usyc factor RD-F-137 score green collected_at 2026-05-15 21:56:43