Provenance Passport
Two Zimmermanns (Nicky and Simone Zimmermann)
Caroline Zilinsky, 2026
Passport ID
73b05c91-1b78-46b8-a3ce-d0acf04ec363
Entries
6
Chain Integrity
✓ Intact
Chain of Custody
Added to The Back Room
7/4/2026, 2:38:35 AM
hash: 29a41f4e6eee1ee20c8d5d8132715d49617cab74b3071b99d54cb231c0872930
prev: — (genesis)
Gallery Sale
7/11/2026, 5:46:23 AM
hash: 8a31b51790a6d930b6b6403ad5980cdd95dc4e79bb71a341fcc00e2745bee8ac
prev: 29a41f4e6eee1ee20c8d5d8132715d49617cab74b3071b99d54cb231c0872930
Gallery Sale
7/11/2026, 9:41:43 AM
hash: d1b8383af5f7f39de1f79ddc39407e3b752cd617f99ed9cc41ef7e195bbf7e15
prev: 8a31b51790a6d930b6b6403ad5980cdd95dc4e79bb71a341fcc00e2745bee8ac
Gallery Sale
7/11/2026, 9:49:51 AM
hash: 95d189bb87a394dbfef77bb621aa291b174f3b7bebd8f9f1aa4fcb44c3856d3a
prev: d1b8383af5f7f39de1f79ddc39407e3b752cd617f99ed9cc41ef7e195bbf7e15
Gallery Sale
7/11/2026, 11:02:11 AM
hash: 9e2e572cc4c1225d299d1bd4b96026bb486a775bb0afb5fe09910d9bd24751a5
prev: 95d189bb87a394dbfef77bb621aa291b174f3b7bebd8f9f1aa4fcb44c3856d3a
Valuation
7/26/2026, 6:02:19 AM
hash: c887a8fca5fdb7b85de7212185a104a4ecda3b6ce59ff4f1c4cc77e0f19e988c
prev: 9e2e572cc4c1225d299d1bd4b96026bb486a775bb0afb5fe09910d9bd24751a5
Each entry above stores a cryptographic hash of the entry before it, forming an append-only chain — altering any past entry would break every hash after it. This is not a public blockchain; it's maintained privately by The Back Room and verified the same way: by recomputing each hash and confirming it matches.
The Back Room · backroom.art
Certificate of Provenance
Two Zimmermanns (Nicky and Simone Zimmermann)
Caroline Zilinsky, 2026
Passport ID
73b05c91-1b78-46b8…
Entries Recorded
6
Ledger Integrity
Verified Intact
Chain of Custody
| Added to The Back Room | 4 July 2026 |
| Gallery Sale | 11 July 2026 |
| Gallery Sale | 11 July 2026 |
| Gallery Sale | 11 July 2026 |
| Gallery Sale | 11 July 2026 |
| Valuation | 26 July 2026 |
This certificate attests that the chain of custody above is recorded on The Back Room's private, hash-chained provenance ledger and has been verified intact at time of printing.
Authorised Signatory
The Back Room
29 July 2026