Octeto Buenos Aires
type: MusicGroup
genre: tango
description: thumb|355x355px|Octeto Buenos Aires promotional photo The Octeto Buenos Aires was a legendary tango group formed in 1955 by the Argentine bandoneon player Astor Piazzolla. In 1958 the Octeto was disba
popularity: 3
followers: 251
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfd0a4ddb687d1108525163d613b09bd1bf16a0ece649dedf77fc4830e1d269d5
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/a0cf114f-fe91-4a73-9325-cc9ea7e76231.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a0cf114f-fe91-4a73-9325-cc9ea7e76231.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a0cf114f-fe91-4a73-9325-cc9ea7e76231
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfd0a4ddb687d1108525163d613b09bd1bf16a0ece649dedf77fc4830e1d269d5","name":"Octeto Buenos Aires","registered_at":"2026-06-20T05:39:52Z","symbol":"NIM1528842","token_address":"0x2a0788d859ea0697b2c8b6e999c187919984f264","type":"artist","uuid":"a0cf114f-fe91-4a73-9325-cc9ea7e76231"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a4ddb687d1108525163d613b09bd1bf16a0ece649dedf77fc4830e1d269d5. 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/a0cf114f-fe91-4a73-9325-cc9ea7e76231.json and https://artists.proofprofile.net/proofs/artist/a0cf114f-fe91-4a73-9325-cc9ea7e76231.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0xfd0a4ddb687d1108525163d613b09bd1bf16a0ece649dedf77fc4830e1d269d5","name":"Octeto Buenos Aires","registered_at":"2026-06-20T05:39:52Z","symbol":"NIM1528842","token_address":"0x2a0788d859ea0697b2c8b6e999c187919984f264","type":"artist","uuid":"a0cf114f-fe91-4a73-9325-cc9ea7e76231"}
album: Tangology
  type: MusicAlbum
  date published: 2012-02-07