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

Block 19866

Hash
000000d4e6deb4894e1d11aaea5e6ce892dc4ac91b701e821ca85a5cc5915ea5
Confirmations
22351
Time
2026-10-11 00:56:03 UTC
Median time
2026-10-11 00:48:03 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
3a1c67c36fd5a4d6a321bdcdd1938ff382116307564fec41f3aab3a5b8ff664e
Previous block
000000ae8d410915a1c9fc60b9ad6c394bce2a752b5c88291c00f0881c181c09
Next block
000000590e3036df920f0aedf177083bfba87ba24bb07a3662e3da34af2fbad0

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 19866 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
ab3f223e09d1fa3e926e90abd086efa1… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
3a1c67c36fd5…b3a5b8ff664e coinbase1250