This proof is cryptographically independent. The certificate hash, its Ed25519 and post-quantum (ML-DSA-65) signatures, and the Merkle root are verifiable by any third party — without contacting Serial Alice. The blockchain anchor on Polygon is permanent and cannot be removed.
SHA-256 of the certificate payload
Signed by Serial Alice signing key
Certificate included in a Merkle batch
Merkle root committed on Polygon mainnet