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

Block 19251

Hash
000000c1d6ee7ae58b44140753d0fef8bcc221fa97a121d951db60ec80953c62
Confirmations
22027
Time
2026-10-10 07:45:52 UTC
Median time
2026-10-10 07:38:07 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c2a86e6bb56dc632a37a44e8752cef782245a133c64094061e5e62e373775b02
Previous block
00000003ce1fad90e0aef75c6caf5735adb9a44a2c8c5c5fb6708404fa915bf4
Next block
00000077e8d19f9e8f93fa0643f611405eeb43d56db0221971594cfd1244e100

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 19251 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
371021e78bcb2b25b23a724eb567a8a7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c2a86e6bb56d…62e373775b02 coinbase1250