Check that every reference in a child dataset resolves to a parent. Containment is one-directional, which is the difference from a reconciliation: a parent key nothing references is normal and is reported as a count, while a child key with no parent is a broken reference reported with every row carrying it. Also catches a duplicated parent key, which makes any reference to it ambiguous.
Coinbase Agentic Market feed · snapshot May 2026 (not live on-chain)
| From | Amount | When |
|---|---|---|
| 0x7e6b65…2b1c | $0.0010 | 2026-09-09T21:47:47 |