| LS | Title | From | To | Approval date |
| SG20-LS220 | LS/r on standardization of vocabulary for blockchain for supporting Internet of things and smart cities and communities in data processing and management aspects (reply to SG16-LS214) | SG20 | SG16; | 2021-05-27 |
| SG16-LS214 | LS/r on standardization of vocabulary for blockchain for supporting Internet of things and smart cities and communities in data processing and management aspects (SG20-LS162) [to ITU-T SG20] | SG16 | SG20; | 2020-12-03 |
| SG5-LS173 | LS/r on Draft Recommendation ITU-T Y.blockchain-terms (reply to SG20-LS162) | SG5 | SG20; | 2020-10-23 |
| SG17-LS276 | LS/r on draft Recommendation ITU-T Y.blockchain-terms (reply to SG20-LS162) | SG17 | SG20; | 2020-09-03 |
| SG20-LS162 | LS on draft Recommendation ITU-T Y.blockchain-terms | SG20 | SG2; SG3; SG5; SG9; SG11; SG12; SG13; SG15; SG16; SG17; | 2020-07-16 |
