0xa057cf38f2cad771a64a6b90169e44d8421dc1df9a2e599e0a519085ec10b3ab

How to verify this batch yourself

Take any stamp's content hash, walk the merkle proof in its certificate to recompute the root, then call timestamps(root) on the BA Stamper contract on any Polygon full node. The block timestamp returned is the on-chain proof — no trust in BA Stamp required.