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

Block 19552

Hash
00000039261bbf7523a31c796b6c942585a3aec87a4a490ab4a74caf5a0a7bde
Confirmations
20782
Time
2026-10-10 16:09:33 UTC
Median time
2026-10-10 16:01:21 UTC
Transactions
2
Size
2,991
Weight
11,445
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
8dc4dd19e796d9dde8d95f0bee739387bf86599319e0c15b89fddc71e3a6cbf0
Previous block
000000f88d575a24822493b390e8d896577b7b7c8c8058eb0fc9f213ea406d2e
Next block
00000015165aecd7de2cd26b2e1f98d1894f8d4c9c409df287867598bbaae00d

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 19552 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
9282fc9b675026ac8d23fb5ff2f9c8a9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6bcc23cc1726…a5271eed195d coinbase1250.0000117
b952c979be4b…3b9cb7ec1d02 spends P2MR110.00998830.0000117