← AI Transparency Labels

Verifying an AI Transparency Label

Every label issued by CICS is signed with a dedicated Ed25519 key. The signature covers the canonical string /, which deterministically encodes every structured dimension of the label.

Key fingerprint

D42D3EFFC28E1A8C2A0EC6923F65B9506C54C838

Download the public key (key.asc)

  1. Import the CICS AI Labels public key:

    curl -fsSL https://cics.ch/ai-label/key.asc | gpg --import

  2. Copy the canonical string and the armored signature from the label page (both are visible).

  3. Run the verification:

    # save the armored signature to sig.asc, then:
gpg --verify sig.asc <(printf %s "CICS-2026-05-001/AITL:1/I:R/T:C+F+R/M:claude-opus-4.7/R:F/S:H+P")
#
# expected output:
# gpg: Good signature from "CICS AI Labels <ai-labels@cics.ch>"
# gpg:                using EDDSA key D42D3EFFC28E1A8C2A0EC6923F65B9506C54C838