Rengo
type: MusicGroup
description: The , commonly known as , is the largest national trade union center in Japan, with over six million members as of 2011.Rengo website Rengo brochure 2010-2011 Retrieved on July 6, 2012 It was founded
popularity: 3
followers: 56
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcaa9f1e3ec7a648f2d87328669c63c9b7830af328118b07a5a77c686dc0b5958
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c227a92e-6f22-4b10-897d-22dd8a087978.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c227a92e-6f22-4b10-897d-22dd8a087978.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c227a92e-6f22-4b10-897d-22dd8a087978
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
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 0xcaa9f1e3ec7a648f2d87328669c63c9b7830af328118b07a5a77c686dc0b5958. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c227a92e-6f22-4b10-897d-22dd8a087978.json and https://artists.proofprofile.net/proofs/artist/c227a92e-6f22-4b10-897d-22dd8a087978.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T07:29:20Z
album: Dolido
  type: MusicAlbum
  date published: 2025-03-26
album: Lo Prometido
  type: MusicAlbum
  date published: 2025-04-08
album: Amor de Tango
  type: MusicAlbum
  date published: 2025-05-12
album: Rosas y espinas
  type: MusicAlbum
  date published: 2025-05-23
  track: Rosas y espinas
    type: MusicRecording
    duration: PT2M49S
    duration ms: 169079
    explicit: false
    by artist: Rengo
    in album: Rosas y espinas
      type: MusicAlbum
      date published: 2025-05-23
    isrc code: QZRP52594294
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T14:51:28+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xfbd3dd015e1c59dde4454d6dd5bcde6e0b4261536b23f0d00de07bb1549c6894
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959146
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959146
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52594294
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T15:41:47Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xfbd3dd015e1c59dde4454d6dd5bcde6e0b4261536b23f0d00de07bb1549c6894. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52594294 — a six-check JSON result.
      date published: 2026-07-22T15:41:47Z
    audio: Rosas y espinas
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 90.941
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.74
      additional property: Energy
        type: PropertyValue
        value: 0.395
      additional property: Speechiness
        type: PropertyValue
        value: 0.061
      additional property: Acousticness
        type: PropertyValue
        value: 0.266
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.018
      additional property: Liveness
        type: PropertyValue
        value: 0.144
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.264
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.656
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Vida Mia
  type: MusicAlbum
  date published: 2025-09-11
album: Cielo Azul
  type: MusicAlbum
  date published: 2025-09-15