$ cat /tmp/uuid.php
<?php

$uuid = $argv[1];
echo "checking: $uuid - " . (uuid_is_valid($uuid) ? 'OK' : 'FAIL') . "\n";


$ for uuid in $(echo 'SELECT uuid FROM node LIMIT 50;' | drush @dev sqlc); do php /tmp/uuid.php $uuid; done
checking: uuid - FAIL
checking: 00bdd5b0-988c-38a4-31a2-8cf1e30f3159 - OK
checking: 00e53cf7-ec92-5f44-ed85-183470a73e61 - OK
checking: 014700a6-6ed6-4124-090e-a81e8e18b90c - OK
checking: 014bde7b-cb56-9254-cdc6-2afc27c36208 - OK
checking: 01790dbb-ebfb-1934-2ddc-6624d6b9ea66 - OK
checking: 019f18ac-3666-e724-859d-0a337d258a7c - OK
checking: 01cc2bb5-3d15-75f4-8975-8f15bf42371e - OK
checking: 01edd07a-a1a7-48a4-ddac-4bcda46c9c04 - OK
checking: 02617fed-e866-0cb4-3d24-45f88af2afa0 - OK
checking: 027619c6-7148-9634-5dbf-300a5c525126 - OK
checking: 02bd6688-4e08-2294-49a6-9ad78ce8a8ae - OK
checking: 02c91e8d-991e-e184-9dff-6af55443f4b5 - OK
checking: 02cb0c12-60e2-4b84-3102-418096d26b54 - OK
checking: 02f7258b-739c-de84-d5db-41a6b590ad64 - OK
checking: 0301956b-9443-3fb4-e16b-72821994c4cc - OK
checking: 03a37f98-2eae-1464-89de-3e24d7bf9550 - OK
checking: 03d9aed4-609a-8784-052c-f959ec3a5f28 - OK
checking: 03eb85af-a4b9-b174-8dd4-f60fe00235d8 - OK
checking: 047c0c7a-14f8-0eb4-a19b-af54ee21262e - OK
checking: 04ae94a7-7732-92d4-191d-a28d4179fd46 - OK
checking: 04bcd1f5-bac6-ed44-fd51-aec10f1a74ea - OK
checking: 04d7bf0b-708e-e964-d5b9-7a521a96c5b6 - OK
checking: 04d96935-c787-73f4-f521-20281e6ad111 - OK
checking: 052035f4-fa97-4364-2503-8dbe0d55b69a - OK
checking: 05891ea4-b259-ee84-2914-2deecfe921d9 - OK
checking: 05b5f125-d65b-5204-7197-e80f6700381a - OK
checking: 0619b7a3-c7b3-0654-ddee-9022ac6423e9 - OK
checking: 0621c3ed-6c52-8664-b922-49562acbc2a5 - OK
checking: 06bfdcc7-b3a6-f8f4-496b-28267e0e3cb4 - OK
checking: 078fbc72-b1ce-fb44-6dbe-4ece609a12e1 - OK
checking: 07b1cddd-a349-9c54-7989-ec2106a939c0 - OK
checking: 081fdd85-e327-00f4-d922-0c804453b624 - OK
checking: 08413b78-7355-b6b4-bd4e-cdd088b701e1 - OK
checking: 084f526f-b907-5744-d9ed-db3e614c18e8 - OK
checking: 08b3184e-6886-2f84-2dc6-10788077f69a - OK
checking: 08b3a247-bdad-e5c4-c1c3-81bdc4f37027 - OK
checking: 08df6ea3-aacb-d254-c5f5-f3f810d87000 - OK
checking: 090e1cdd-56b8-8d94-b117-c18129f7bd64 - OK
checking: 0946492f-4760-a554-0d27-ffcaff2f7644 - OK
checking: 094e30e8-6c16-d5f4-4d81-ac450cf59dc3 - OK
checking: 0977c246-0477-1af4-b559-1c71c18e1ae3 - OK
checking: 0a6b6a80-071d-b334-e1d1-d4d9ac83808f - OK
checking: 0a8d0e20-5afd-1d94-f942-3ba0dd13a938 - OK
checking: 0ad0cd97-e491-eae4-a50c-ad7f60b2663d - OK
checking: 0aef59c3-fb5a-e3b4-f5c1-a92f502c1bd5 - OK
checking: 0b033a86-51b0-6cb4-bd99-107289b92b46 - OK
checking: 0b1ed7ae-3c0d-ccf4-8964-2fb37e9ed87c - OK
checking: 0b2c84b2-f9fd-af14-69b3-4264c9a79a64 - OK
checking: 0bb2bc4f-5c87-ae14-3da2-8488882b9af7 - OK
checking: 0c6f0de6-2670-32d4-992d-7216817b5ba7 - OK