OP_IF
  …
  OP_PUSH 3
  OP_PUSH 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a090807060504030201000001
  …
OP_ENDIF
```

### Notes

The tag `3` is used because it is the first available odd tag. Unrecognized odd
tags do not make an inscription unbound, so child inscriptions would be
recognized and tracked by old versions of `ord`.

A collection can be closed by burning the collection's parent inscription,
which guarantees that no more items in the collection can be issued.