Marta Cabrejas
type: MusicGroup
popularity: 6
followers: 128
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x66c4dc2822c6ac9a87c44aac97a2b83ee1524d7ee325e9c9a97e3e30b568ced6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1566fbcb-68e5-4357-bd1a-08b6235f5d34.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1566fbcb-68e5-4357-bd1a-08b6235f5d34.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1566fbcb-68e5-4357-bd1a-08b6235f5d34
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x66c4dc2822c6ac9a87c44aac97a2b83ee1524d7ee325e9c9a97e3e30b568ced6","name":"Marta Cabrejas","registered_at":"2026-06-15T21:04:41Z","symbol":"NIM0831537","token_address":"0xd34abf9a4cfe151928d3c07c49038eeb016507ce","type":"artist","uuid":"1566fbcb-68e5-4357-bd1a-08b6235f5d34"}
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 0x66c4dc2822c6ac9a87c44aac97a2b83ee1524d7ee325e9c9a97e3e30b568ced6. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1566fbcb-68e5-4357-bd1a-08b6235f5d34.json and https://artists.proofprofile.net/proofs/artist/1566fbcb-68e5-4357-bd1a-08b6235f5d34.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0x66c4dc2822c6ac9a87c44aac97a2b83ee1524d7ee325e9c9a97e3e30b568ced6","name":"Marta Cabrejas","registered_at":"2026-06-15T21:04:41Z","symbol":"NIM0831537","token_address":"0xd34abf9a4cfe151928d3c07c49038eeb016507ce","type":"artist","uuid":"1566fbcb-68e5-4357-bd1a-08b6235f5d34"}
album: Canción a nadie
  type: MusicAlbum
  date published: 2022-01-02
album: no quiero ser mayor
  type: MusicAlbum
  date published: 2024-03-11
  track: no quiero ser mayor
    type: MusicRecording
    duration: PT3M37S
    duration ms: 217004
    explicit: false
    by artist: Marta Cabrejas
    in album: no quiero ser mayor
      type: MusicAlbum
      date published: 2024-03-11
    isrc code: GX8KD2454125
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T22:01:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf00282c79204ac80bf32b9e2f9e0395c5083108d3486ee9272f751cff066459c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957766
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957766
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8KD2454125
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T22:25:04Z
    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 0xf00282c79204ac80bf32b9e2f9e0395c5083108d3486ee9272f751cff066459c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8KD2454125 — a six-check JSON result.
      date published: 2026-07-12T22:25:04Z
    audio: no quiero ser mayor
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 93.326
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.36
      additional property: Energy
        type: PropertyValue
        value: 0.277
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0.911
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.121
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.16
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.288
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major