Joaquín Valverde Sanjuán
type: MusicGroup
description: thumb|Photograph of the Spanish composer Quinito Valverde published in 1912 on the occasion of the premiere of his work El Príncipe Casto, written by Carlos Arniches and Enrique García Álvarez. Joaquí
popularity: 7
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x28330bbe4a50bec2a31e92070d7318efac49f500dee41d5f3833bf04341270f7
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/fc532039-9464-42c5-8300-2ed3c1fa83e8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/fc532039-9464-42c5-8300-2ed3c1fa83e8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/fc532039-9464-42c5-8300-2ed3c1fa83e8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x28330bbe4a50bec2a31e92070d7318efac49f500dee41d5f3833bf04341270f7","name":"Joaquín Valverde Sanjuán","registered_at":"2026-06-21T17:51:49Z","symbol":"NIM1993283","token_address":"0x12d2b41e7e9cd4a8126d9d904cb3276599c01117","type":"artist","uuid":"fc532039-9464-42c5-8300-2ed3c1fa83e8"}
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 0x28330bbe4a50bec2a31e92070d7318efac49f500dee41d5f3833bf04341270f7. 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/fc532039-9464-42c5-8300-2ed3c1fa83e8.json and https://artists.proofprofile.net/proofs/artist/fc532039-9464-42c5-8300-2ed3c1fa83e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x28330bbe4a50bec2a31e92070d7318efac49f500dee41d5f3833bf04341270f7","name":"Joaquín Valverde Sanjuán","registered_at":"2026-06-21T17:51:49Z","symbol":"NIM1993283","token_address":"0x12d2b41e7e9cd4a8126d9d904cb3276599c01117","type":"artist","uuid":"fc532039-9464-42c5-8300-2ed3c1fa83e8"}
track: Zarzuela - Remasterizado

Zarzuela - Remasterizado
type: MusicRecording
duration: PT8M11S
duration ms: 491120
explicit: false
by artist: Federico Chueca
by artist: Francisco Alonso
by artist: Geronimo Gimenez
by artist: Jacinto Guerrero Torres
by artist: Joaquín Valverde Durán
by artist: Ruperto Chapí
by artist: Joaquín Valverde Sanjuán
by artist: Tomás López Torregrosa
by artist: Paloma San Basilio
by artist: Luis Cobos
by artist: Orquesta Sinfónica de Europa
in album: Encantados (Remasterizado)
  type: MusicAlbum
  date published: 2008-12-15
isrc code: ES5021702674
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-11T04:11:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b3e834b74df15cc4e184769808ebae323acdaea41479f9329c634ae38dab4c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021702674
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 953520
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-06-13T13:32:09+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e834b74df15cc4e184769808ebae323acdaea41479f9329c634ae38dab4c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021702674.
  date published: 2026-06-13T13:32:09Z
audio: Zarzuela - Remasterizado
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 135.268
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.338
  additional property: Energy
    type: PropertyValue
    value: 0.451
  additional property: Speechiness
    type: PropertyValue
    value: 0.061
  additional property: Acousticness
    type: PropertyValue
    value: 0.84
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.753
  additional property: Liveness
    type: PropertyValue
    value: 0.74
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.467
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.492
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Major