Ars Combinatoria
type: MusicGroup
genre: choral
genre: gregorian chant
genre: medieval
description: Ars Combinatoria (combinatorial art) may refer to: A logical method described by Gottfried Leibniz in his De Arte Combinatoria and attributed to Ramon Llull Ars Combinatoria (journal), a Canadian m
popularity: 4
followers: 120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe27a0343477a3255a637bfc40a76c8cae3a1c55ce1e923ad6cec8a90fc0ba06c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b88d1df0-4844-415d-9ca3-9c059d82bd44.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b88d1df0-4844-415d-9ca3-9c059d82bd44.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b88d1df0-4844-415d-9ca3-9c059d82bd44
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe27a0343477a3255a637bfc40a76c8cae3a1c55ce1e923ad6cec8a90fc0ba06c","name":"Ars Combinatoria","registered_at":"2026-06-20T15:38:29Z","symbol":"NIM1646823","token_address":"0x74944aca045863259d874bbf10204f44361dae20","type":"artist","uuid":"b88d1df0-4844-415d-9ca3-9c059d82bd44"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a0343477a3255a637bfc40a76c8cae3a1c55ce1e923ad6cec8a90fc0ba06c. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b88d1df0-4844-415d-9ca3-9c059d82bd44.json and https://artists.proofprofile.net/proofs/artist/b88d1df0-4844-415d-9ca3-9c059d82bd44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0xe27a0343477a3255a637bfc40a76c8cae3a1c55ce1e923ad6cec8a90fc0ba06c","name":"Ars Combinatoria","registered_at":"2026-06-20T15:38:29Z","symbol":"NIM1646823","token_address":"0x74944aca045863259d874bbf10204f44361dae20","type":"artist","uuid":"b88d1df0-4844-415d-9ca3-9c059d82bd44"}