César Iván
type: MusicGroup
popularity: 12
followers: 2534
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7fff2251c0662e6e07b41d8f4619ce625c5ba20226b6c565166946b14d510288
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953694
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953694
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/707fe507-fdf4-44cb-94d2-6df2085dbe91.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/707fe507-fdf4-44cb-94d2-6df2085dbe91.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/707fe507-fdf4-44cb-94d2-6df2085dbe91
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:38:09Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7fff2251c0662e6e07b41d8f4619ce625c5ba20226b6c565166946b14d510288","name":"César Iván","registered_at":"2026-06-14T16:19:48Z","symbol":"NIM0508225","token_address":"0x26b47f3826707cac4e47ed26da6fbe920a68032e","type":"artist","uuid":"707fe507-fdf4-44cb-94d2-6df2085dbe91"}
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 0x7fff2251c0662e6e07b41d8f4619ce625c5ba20226b6c565166946b14d510288. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/707fe507-fdf4-44cb-94d2-6df2085dbe91.json and https://artists.proofprofile.net/proofs/artist/707fe507-fdf4-44cb-94d2-6df2085dbe91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:38:09Z
  text: {"copyright_id":"0x7fff2251c0662e6e07b41d8f4619ce625c5ba20226b6c565166946b14d510288","name":"César Iván","registered_at":"2026-06-14T16:19:48Z","symbol":"NIM0508225","token_address":"0x26b47f3826707cac4e47ed26da6fbe920a68032e","type":"artist","uuid":"707fe507-fdf4-44cb-94d2-6df2085dbe91"}
album: Quiero Creer
  type: MusicAlbum
  date published: 2014-06-14
album: Quiero Creer
  type: MusicAlbum
  date published: 2014-06-14
album: Estar Contigo
  type: MusicAlbum
  date published: 2018-08-24
album: Entre Sábanas Y Risas
  type: MusicAlbum
  date published: 2018-11-02
album: Cerca de Ti
  type: MusicAlbum
  date published: 2019-03-01
album: El Recuerdo y el Olvido
  type: MusicAlbum
  date published: 2019-11-08
album: Más de Lo Que Crees
  type: MusicAlbum
  date published: 2019-12-06
album: Si Vas a Volver
  type: MusicAlbum
  date published: 2020-01-10
album: Estar Contigo
  type: MusicAlbum
  date published: 2020-08-07
  track: Entre Sábanas y Risas
    type: MusicRecording
    duration: PT3M31S
    duration ms: 211500
    explicit: false
    by artist: César Iván
    in album: Estar Contigo
      type: MusicAlbum
      date published: 2020-08-07
    isrc code: US7VG1810845
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T23:45:24+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xa6d6361756d606c0b558148b54f0587f0163c7d05e9b4792ae527bf3ffa84221
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958942
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958942
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG1810845
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T00:24:07Z
    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 0xa6d6361756d606c0b558148b54f0587f0163c7d05e9b4792ae527bf3ffa84221. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US7VG1810845.
      date published: 2026-07-21T00:24:07Z
    audio: Entre Sábanas y Risas
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 92.111
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.565
      additional property: Energy
        type: PropertyValue
        value: 0.438
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.739
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.151
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.693
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.694
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Diferente
  type: MusicAlbum
  date published: 2020-11-27
album: Tiempo
  type: MusicAlbum
  date published: 2021-03-12
album: Tiempo
  type: MusicAlbum
  date published: 2021-05-14
album: Sintiendo más
  type: MusicAlbum
  date published: 2023-10-23
album: Antes
  type: MusicAlbum
  date published: 2024-06-28
album: Dos
  type: MusicAlbum
  date published: 2024-08-02
album: Agua de Rio
  type: MusicAlbum
  date published: 2024-09-13
  track: Agua de Rio
    type: MusicRecording
    duration: PT3M13S
    duration ms: 193000
    explicit: false
    by artist: César Iván
    in album: Agua de Rio
      type: MusicAlbum
      date published: 2024-09-13
    isrc code: GBMA22391952
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T03:29:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdf617459e7bf3049e6780bf835b0766a0b9ec4fc2994e90e02ecdc5bb08c2704
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958234
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958234
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMA22391952
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T03:46:09Z
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Agua de Rio

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf617459e7bf3049e6780bf835b0766a0b9ec4fc2994e90e02ecdc5bb08c2704. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBMA22391952.
date published: 2026-07-16T03:46:09Z

Agua de Rio
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 131.969
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 4
additional property: Danceability
  type: PropertyValue
  value: 0.64
additional property: Energy
  type: PropertyValue
  value: 0.657
additional property: Speechiness
  type: PropertyValue
  value: 0.043
additional property: Acousticness
  type: PropertyValue
  value: 0.211
additional property: Instrumentalness
  type: PropertyValue
  value: 0
additional property: Liveness
  type: PropertyValue
  value: 0.133
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.61
additional property: Loudness (dB)
  type: PropertyValue
  value: -9.474
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Minor