Ferfri
type: MusicGroup
popularity: 5
followers: 178
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x502466e6cdffe00a5fb40168ef363f1163cbea92746921cc97aa0e8424bcaa20
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/d23fe8b5-29ce-489f-a312-ea06d7e99c72.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d23fe8b5-29ce-489f-a312-ea06d7e99c72.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d23fe8b5-29ce-489f-a312-ea06d7e99c72
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502466e6cdffe00a5fb40168ef363f1163cbea92746921cc97aa0e8424bcaa20. 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/d23fe8b5-29ce-489f-a312-ea06d7e99c72.json and https://artists.proofprofile.net/proofs/artist/d23fe8b5-29ce-489f-a312-ea06d7e99c72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
album: Resaca de Ti
  type: MusicAlbum
  date published: 2021-07-07
album: Dios Nos Puso en el Camino
  type: MusicAlbum
  date published: 2021-09-15
album: Ganas de Vivir
  type: MusicAlbum
  date published: 2022-12-16
album: El Hombre del Tiempo
  type: MusicAlbum
  date published: 2023-03-09
album: Un folio en blanco
  type: MusicAlbum
  date published: 2023-06-07
album: Ojalá No Te Hubiera Conocido
  type: MusicAlbum
  date published: 2024-12-04
  track: Ojalá No Te Hubiera Conocido
    type: MusicRecording
    duration: PT3M6S
    duration ms: 186067
    explicit: true
    by artist: Ferfri
    in album: Ojalá No Te Hubiera Conocido
      type: MusicAlbum
      date published: 2024-12-04
    isrc code: QZWFW2450265
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T23:18:46+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf67e991d70616f1430f648a3009cb62026f18c417cc35c92ab2a913e07a5726a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958465
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958465
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFW2450265
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T00:04:42Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e991d70616f1430f648a3009cb62026f18c417cc35c92ab2a913e07a5726a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZWFW2450265.
      date published: 2026-07-18T00:04:42Z
    audio: Ojalá No Te Hubiera Conocido
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 88.951
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.589
      additional property: Energy
        type: PropertyValue
        value: 0.454
      additional property: Speechiness
        type: PropertyValue
        value: 0.025
      additional property: Acousticness
        type: PropertyValue
        value: 0.129
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.447
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.268
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.485
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor