Samuel Fematt
type: MusicGroup
popularity: 12
followers: 4327
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9af70c6e437890d3afe9537dc3b3d660910ee7babb2f36518283ff7697f2245d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/885068ac-216e-4d8e-88e3-3a03a62a03f7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/885068ac-216e-4d8e-88e3-3a03a62a03f7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/885068ac-216e-4d8e-88e3-3a03a62a03f7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T01:05:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9af70c6e437890d3afe9537dc3b3d660910ee7babb2f36518283ff7697f2245d","name":"Samuel Fematt","registered_at":"2026-06-14T18:50:31Z","symbol":"NIM0544149","token_address":"0x1ccb3e46b104e872ee17d72a9ff2757313cc16f0","type":"artist","uuid":"885068ac-216e-4d8e-88e3-3a03a62a03f7"}
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 0x9af70c6e437890d3afe9537dc3b3d660910ee7babb2f36518283ff7697f2245d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/885068ac-216e-4d8e-88e3-3a03a62a03f7.json and https://artists.proofprofile.net/proofs/artist/885068ac-216e-4d8e-88e3-3a03a62a03f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
  text: {"copyright_id":"0x9af70c6e437890d3afe9537dc3b3d660910ee7babb2f36518283ff7697f2245d","name":"Samuel Fematt","registered_at":"2026-06-14T18:50:31Z","symbol":"NIM0544149","token_address":"0x1ccb3e46b104e872ee17d72a9ff2757313cc16f0","type":"artist","uuid":"885068ac-216e-4d8e-88e3-3a03a62a03f7"}
album: Hoy Quiero Cantar
  type: MusicAlbum
  date published: 2015-10-10
album: En Blanco
  type: MusicAlbum
  date published: 2016-01-04
  track: En Blanco
    type: MusicRecording
    duration: PT2M55S
    duration ms: 175350
    explicit: false
    by artist: Samuel Fematt
    in album: En Blanco
      type: MusicAlbum
      date published: 2016-01-04
    isrc code: TCACK1597495
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T12:15:41+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x58e114da70a8cdf1c930c9ed53f7489bae2d3497e85bcee52bcd7ee0ba5b0faa
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958157
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958157
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACK1597495
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T15:17:39Z
    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 0x58e114da70a8cdf1c930c9ed53f7489bae2d3497e85bcee52bcd7ee0ba5b0faa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:39Z), 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/TCACK1597495.
      date published: 2026-07-15T15:17:39Z
    audio: En Blanco
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 71.915
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.584
      additional property: Energy
        type: PropertyValue
        value: 0.226
      additional property: Speechiness
        type: PropertyValue
        value: 0.028
      additional property: Acousticness
        type: PropertyValue
        value: 0.825
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.098
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.378
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.563
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Fuego
  type: MusicAlbum
  date published: 2016-03-23
  track: Fuego
    type: MusicRecording
    duration: PT3M25S
    duration ms: 205366
    explicit: false
    by artist: Samuel Fematt
    in album: Fuego
      type: MusicAlbum
      date published: 2016-03-23
    isrc code: TCACN1601879
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T18:02:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd426eeb0502c56e1693ad7f1dbbcc9f2972ccb72bbee53ac3b342eb2df5922ef
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956551
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956551
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCACN1601879
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T21:18:05Z
    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 0xd426eeb0502c56e1693ad7f1dbbcc9f2972ccb72bbee53ac3b342eb2df5922ef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACN1601879.
      date published: 2026-07-03T21:18:05Z
    audio: Fuego
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.954
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.795
      additional property: Energy
        type: PropertyValue
        value: 0.609
      additional property: Speechiness
        type: PropertyValue
        value: 0.039
      additional property: Acousticness
        type: PropertyValue
        value: 0.021
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.156
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Amor de Ayer

Valence (Positivity)
type: PropertyValue
value: 0.87

Loudness (dB)
type: PropertyValue
value: -8.036

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Minor

Amor de Ayer
type: MusicAlbum
date published: 2016-06-07