Sara Martínez Reina
type: MusicGroup
popularity: 4
followers: 257
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x476d24141dc76dfc760b3aa35e76a49dc29053c585c8587d0d7b0f25f5fab84a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953970
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953970
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29e64715-cace-4d09-b4d7-8caa5a09a3fe.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29e64715-cace-4d09-b4d7-8caa5a09a3fe.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/29e64715-cace-4d09-b4d7-8caa5a09a3fe
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:09:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x476d24141dc76dfc760b3aa35e76a49dc29053c585c8587d0d7b0f25f5fab84a","name":"Sara Martínez Reina","registered_at":"2026-06-16T04:07:36Z","symbol":"NIM0932506","token_address":"0x73941a266e6e8a533e335790d4d49efa1d702ce4","type":"artist","uuid":"29e64715-cace-4d09-b4d7-8caa5a09a3fe"}
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 0x476d24141dc76dfc760b3aa35e76a49dc29053c585c8587d0d7b0f25f5fab84a. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29e64715-cace-4d09-b4d7-8caa5a09a3fe.json and https://artists.proofprofile.net/proofs/artist/29e64715-cace-4d09-b4d7-8caa5a09a3fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:09:39Z
  text: {"copyright_id":"0x476d24141dc76dfc760b3aa35e76a49dc29053c585c8587d0d7b0f25f5fab84a","name":"Sara Martínez Reina","registered_at":"2026-06-16T04:07:36Z","symbol":"NIM0932506","token_address":"0x73941a266e6e8a533e335790d4d49efa1d702ce4","type":"artist","uuid":"29e64715-cace-4d09-b4d7-8caa5a09a3fe"}
album: A Letter To You
  type: MusicAlbum
  date published: 2023-05-11
album: To Be Loved
  type: MusicAlbum
  date published: 2024-01-19
album: 18th Interlude
  type: MusicAlbum
  date published: 2025-03-14
  track: 18th Interlude
    type: MusicRecording
    duration: PT4M25S
    duration ms: 265500
    explicit: true
    by artist: Sara Martínez Reina
    in album: 18th Interlude
      type: MusicAlbum
      date published: 2025-03-14
    isrc code: QZHN62536603
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T15:29:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3bcbc293c3290571fed6842e9a3a07b5283f908258e677b41ad143c86c7abc03
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958572
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958572
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62536603
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T15:47:37Z
    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 0x3bcbc293c3290571fed6842e9a3a07b5283f908258e677b41ad143c86c7abc03. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZHN62536603.
      date published: 2026-07-18T15:47:37Z
    audio: 18th Interlude
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 94.442
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.425
      additional property: Energy
        type: PropertyValue
        value: 0.328
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.576
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.093
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.136
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.133
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Dream To Keep Smiling
  type: MusicAlbum
  date published: 2025-05-23
  track: Dream To Keep Smiling
    type: MusicRecording
    duration: PT3M39S
    duration ms: 219000
    explicit: false
    by artist: Sara Martínez Reina
    in album: Dream To Keep Smiling
      type: MusicAlbum
      date published: 2025-05-23
    isrc code: QZRP42515522
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T03:25:35+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xdec184edae1bfeb1aef81a9ebe4c5a7fb33702e28b12d2ec9551c37577df3449
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956889
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956889
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42515522
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T06:56:49Z
    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 0xdec184edae1bfeb1aef81a9ebe4c5a7fb33702e28b12d2ec9551c37577df3449. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZRP42515522.
      date published: 2026-07-06T06:56:49Z
    audio: Dream To Keep Smiling
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.03
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.687
      additional property: Energy
        type: PropertyValue
        value: 0.259
      additional property: Speechiness
        type: PropertyValue
        value: 0.041
      additional property: Acousticness
        type: PropertyValue
        value: 0.96
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.004
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.098

Valence (Positivity)
type: PropertyValue
value: 0.217

Loudness (dB)
type: PropertyValue
value: -11.988

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major