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

Block 19623

Hash
000000bea83fd033b2859968fd7d37375d69c3091135161eb9955cab9b40e208
Confirmations
22728
Time
2026-10-10 18:09:59 UTC
Median time
2026-10-10 18:00:42 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
18b2a0c80a4a1d2712e7ad8fad229ba36460a28c0101c9ea60af2ba1234572de
Previous block
000000fa6512c6cadfe60e0550e4897a57d26c2cf79a33c155d7f7ec59e371e8
Next block
000000122acf33ae321c2827575773b4f16a11cbb9d4dd588b9a519ce2375d68

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 19623 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
89ecf4b9ecbd07ca8ef26db1b4ea7071… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
18b2a0c80a4a…2ba1234572de coinbase1250