Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19875

Hash
000000b4615c7b2276d398e521aa68820f7451d8008790a8d5f1bc7602b0a4f3
Confirmations
22377
Time
2026-10-11 01:10:27 UTC
Median time
2026-10-11 01:02:44 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
91ee3e9ed557f35a81a1e78f987091b3845b9f277b410a30ff59168eb8d64097
Previous block
00000109d9de70602e6fd144535e636fdb3d6152a793f0344dba9c53eea69013
Next block
0000004dd013ab49ee9055b3d31f34eb428c78bc5b702487f01bc65aff23d0eb

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 19875 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
b5a991eb5979a9f4203cfe86d491a7c3… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
91ee3e9ed557…168eb8d64097 coinbase1250