Check a pick's record

Every day at 00:15 (Madrid time) we record every pick published the day before in a fingerprint: a hash tree whose root is sealed in Bitcoin with OpenTimestamps. Anyone can check that a pick existed that day with that content, and whether it was changed or deleted later.

Recorded and unchanged

Recorded on 10/20/2026 at 11:54 PM, included in the fingerprint of 10/20/2026.

Pick: #1018002
Tipster: Sisu (@Sisu)
Event: Apollon Kalamarias - Niki Volou
Selection: Apollon Kalamarias +1 · @1.975 · stake 1
Fingerprint of 10/20/2026: fee5d608 12e1df1a f2549fed 03934c00 3300641d a2e17946 3ef22d16 e44f7cc1
Pick leaf: fd46c13d 4379676f e28742eb a32da497 e8d9ede8 a2baea38 ee534471 da7190c9Position 560 of 561
Bitcoin seal: Sent to OpenTimestamps on 10/21/2026, 12:16 AM; Bitcoin confirmation takes a few hours. Download the .ots

Inclusion proof (7 steps)

1. left a8b893c2dd5e4306c4c6ce2b6dc3c41d44692062d6f61e7529f34d0a64298d42
2. left a81b3e9595aa42b67169716574bc5020aaaa1125d2f333d05621ff16943d2527
3. left b39a9cc86b8c9d67ed41c28c5bb9de4e025eef92dd1dfb2888c04ad569f78b3e
4. left 3e4db33ca83f66144139ff4b52cac16906a92693f058005714caca84e59f22d2
5. right 868e79ba035b6a7000a2a5d2b16d98504adb8f50ef9478c0f18f1907af29e8ab
6. left 3ef673d17b7917f5c0a6e50f9fcb4bdad26ab0e994d14f7d4df8c420a3a426c7
7. left 4c781786a00e243c77fc5f4595aa2857401fb36d4816f4c6cf25c298f1e80e07

Recorded content:

["tipsterland-huella-pick",1,1018002,26513,"2026-10-20T21:54:36Z","Apollon Kalamarias - Niki Volou","2026-10-25T16:00:00Z","Apollon Kalamarias +1","1.975","1"]

How to check without trusting us: the leaf is SHA-256(0x00 + content) and each step SHA-256(0x01 + left + right). If the path reaches the root and the .ots verifies with the official OpenTimestamps client (ots verify), the pick was recorded that day. This proves when it was published and that it wasn't touched; it says nothing about whether the pick is good.