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

Block 18964

Hash
0000005fb673ac40c60d330bb5c60bc841928eccfe2db957c313df5505768fa9
Confirmations
22744
Time
2026-10-09 23:38:19 UTC
Median time
2026-10-09 23:29:40 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d783298d082d6b6afc30831f21fdb81f595f32fc65cad4d0757b50d64d7cea56
Previous block
0000007273aa18b0a6f0f771b550abcf7050e86af383f19536d350ac3d1a9316
Next block
000000a3bd3a32b01486814a1ae627f91c3bbc0b8861f14e22158b9f446c8df7

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 18964 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
c19acdc64d74415b3db76234794ce020… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d783298d082d…50d64d7cea56 coinbase1250