0x856f5d7ae9ce9888ff3057cbbb750fe727c11acf98679c9457c7ec2def89d5a7

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.