Grupo uno
type: MusicGroup
description: Grupo Uno was a group of organizers from an East Havana district cultural center. They brainstormed the radical idea of a Cuban rap festival in 1995. One of the principal organizers, Rodolfo Rensoli,
popularity: 4
followers: 63
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0d30bb33b421f9357f2308a6d87fbc6d537dc777a26dadd1e883682ae4262871
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f6f66723-6f20-4f17-a787-c6a568cf263f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f6f66723-6f20-4f17-a787-c6a568cf263f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f6f66723-6f20-4f17-a787-c6a568cf263f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x0d30bb33b421f9357f2308a6d87fbc6d537dc777a26dadd1e883682ae4262871","name":"Grupo uno","registered_at":"2026-06-21T15:39:05Z","symbol":"NIM1961597","token_address":"0x4406c6a8bf47f467fdffc186b33ed0d034adaa27","type":"artist","uuid":"f6f66723-6f20-4f17-a787-c6a568cf263f"}
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 0x0d30bb33b421f9357f2308a6d87fbc6d537dc777a26dadd1e883682ae4262871. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6f66723-6f20-4f17-a787-c6a568cf263f.json and https://artists.proofprofile.net/proofs/artist/f6f66723-6f20-4f17-a787-c6a568cf263f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x0d30bb33b421f9357f2308a6d87fbc6d537dc777a26dadd1e883682ae4262871","name":"Grupo uno","registered_at":"2026-06-21T15:39:05Z","symbol":"NIM1961597","token_address":"0x4406c6a8bf47f467fdffc186b33ed0d034adaa27","type":"artist","uuid":"f6f66723-6f20-4f17-a787-c6a568cf263f"}
album: Grupo Uno
  type: MusicAlbum
  date published: 1970-09-11
album: Fin de Semana
  type: MusicAlbum
  date published: 1971-09-11
album: Los Éxitos
  type: MusicAlbum
  date published: 1990-09-11