Efer
type: MusicGroup
genre: latin house
popularity: 3
followers: 58
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1921a9ffaa0e4dee7130b07b0305b6d94c6f54a119456bf6144f159e118a13b9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f047ffc9-1637-4751-91a5-548405044bcd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f047ffc9-1637-4751-91a5-548405044bcd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f047ffc9-1637-4751-91a5-548405044bcd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
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 0x1921a9ffaa0e4dee7130b07b0305b6d94c6f54a119456bf6144f159e118a13b9. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f047ffc9-1637-4751-91a5-548405044bcd.json and https://artists.proofprofile.net/proofs/artist/f047ffc9-1637-4751-91a5-548405044bcd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
album: 5 Mujeres
  type: MusicAlbum
  date published: 2023-08-11
album: AREPA
  type: MusicAlbum
  date published: 2023-09-25
album: Minina
  type: MusicAlbum
  date published: 2023-10-20
  track: Minina - Radio Edit
    type: MusicRecording
    duration: PT3M29S
    duration ms: 209000
    explicit: false
    by artist: Efer
    in album: Minina
      type: MusicAlbum
      date published: 2023-10-20
    genre: latin house
    isrc code: DEY472378412
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T00:39:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x616d207e9aab9b5b8664e1b80c8a7b055cb52e08b28605e4e90209b5e780a7be
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956857
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEY472378412
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0x616d207e9aab9b5b8664e1b80c8a7b055cb52e08b28605e4e90209b5e780a7be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEY472378412.
      date published: 2026-07-06T01:26:17Z
    audio: Minina - Radio Edit
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.975
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.798
      additional property: Energy
        type: PropertyValue
        value: 0.792
      additional property: Speechiness
        type: PropertyValue
        value: 0.087
      additional property: Acousticness
        type: PropertyValue
        value: 0.111
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.048
      additional property: Liveness
        type: PropertyValue
        value: 0.102
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.754
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.654
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Fina (Efer Edit)
  type: MusicAlbum
  date published: 2023-11-04
album: Efer Edit
  type: MusicAlbum
  date published: 2023-11-04
album: Multiverse House
  type: MusicAlbum
  date published: 2023-11-20
album: No Tengo Na
  type: MusicAlbum
  date published: 2023-12-01
album: Sin miedo
  type: MusicAlbum
  date published: 2024-01-19
album: PAMI
  type: MusicAlbum
  date published: 2024-02-29
album: PAMI
  type: MusicAlbum
  date published: 2024-02-29
album: Arramagala
  type: MusicAlbum
  date published: 2024-03-22
album: Toma La Disco
  type: MusicAlbum
  date published: 2024-04-12
album: Soy Igual Que Tu
  type: MusicAlbum
  date published: 2024-06-21
album: Chain Of Fools (Radio Edit)
  type: MusicAlbum
  date published: 2024-07-12
album: Chain Of Fools (Original Mix)
  type: MusicAlbum
  date published: 2024-07-26
album: Caliente
  type: MusicAlbum
  date published: 2024-09-22
album: Love Letter
  type: MusicAlbum
  date published: 2024-11-29