0x8601c2dfca9df42d1d34a29fcfc9c975dd4a313470ccc5990c7540c7770c34d1

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.