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

Block 19953

Hash
00000037ce641593879658b5e55a7dc4d8fac6fca8da5428a2ad259759c4173e
Confirmations
21768
Time
2026-10-11 03:19:33 UTC
Median time
2026-10-11 03:11:06 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
b672490e6a24a14d5df73e2e48f9428659bc0d4f5d1489acef489c53c0749347
Previous block
000000cc27d7550f630856b9a9485d82ceb9cd08ecb8057ee84bdebde0c20570
Next block
000000cc2349d32a5bbd91ac21f0f4581d174fb573d87f91eee7ff926469d3f2

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 19953 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
c2ab98458ebe59171d28c18f12d1a993… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
b672490e6a24…9c53c0749347 coinbase1250