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

Block 19530

Hash
000000d8930da6663fd4d25495a58842ed88eede0a9f93f210cad28c6c31e83b
Confirmations
22355
Time
2026-10-10 15:33:39 UTC
Median time
2026-10-10 15:25:16 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ae1afdacf1a7dfb4d04272c2c21e450d9e3ebad739c0de329db701bdabc7687c
Previous block
0000009f2b118a01002673e69707515bec3c73304c1fca5cc71eb7a1ecad5fde
Next block
000000cc6c1952a5107eb2b606c06c0e4180d0dd74dd2042104924fbdd088dbc

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 19530 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
548a4e4e4f53a87a31f7bf4ca8a90d3d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ae1afdacf1a7…01bdabc7687c coinbase1250