Bar Kokhba Sextet
type: MusicGroup
genre: avant-garde
genre: free jazz
description: Bar Kokhba Sextet brings together six core members of Masada under the leadership of John Zorn. An improvisational group of New York's downtown artists, the sextet includes Cyro Baptista on percussion
popularity: 3
followers: 356
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa2326f63dd2cde55215dcf4184d3d2e53a793c25a087cffcc299dca51d647417
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f6bfe03-6126-4451-8b79-aeba486f62f4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9f6bfe03-6126-4451-8b79-aeba486f62f4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9f6bfe03-6126-4451-8b79-aeba486f62f4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa2326f63dd2cde55215dcf4184d3d2e53a793c25a087cffcc299dca51d647417","name":"Bar Kokhba Sextet","registered_at":"2026-06-20T05:29:43Z","symbol":"NIM1525625","token_address":"0x1e6bee560ac6d1849eb3f3bbecf671d9dccf52c6","type":"artist","uuid":"9f6bfe03-6126-4451-8b79-aeba486f62f4"}
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 0xa2326f63dd2cde55215dcf4184d3d2e53a793c25a087cffcc299dca51d647417. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f6bfe03-6126-4451-8b79-aeba486f62f4.json and https://artists.proofprofile.net/proofs/artist/9f6bfe03-6126-4451-8b79-aeba486f62f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0xa2326f63dd2cde55215dcf4184d3d2e53a793c25a087cffcc299dca51d647417","name":"Bar Kokhba Sextet","registered_at":"2026-06-20T05:29:43Z","symbol":"NIM1525625","token_address":"0x1e6bee560ac6d1849eb3f3bbecf671d9dccf52c6","type":"artist","uuid":"9f6bfe03-6126-4451-8b79-aeba486f62f4"}