Orquestra Popular Marafreboi
type: MusicGroup
popularity: 4
followers: 92
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2cd7203b132356426f26d081ea1104038ca6027e2b6140248c890e845c9bec0e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce17554d-300f-4684-ae29-1b8ebbcedb09.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ce17554d-300f-4684-ae29-1b8ebbcedb09.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ce17554d-300f-4684-ae29-1b8ebbcedb09
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2cd7203b132356426f26d081ea1104038ca6027e2b6140248c890e845c9bec0e","name":"Orquestra Popular Marafreboi","registered_at":"2026-06-21T00:04:00Z","symbol":"NIM1757616","token_address":"0xae9f3255ceb9ccc730421dd9ac5d3b75dcf63dac","type":"artist","uuid":"ce17554d-300f-4684-ae29-1b8ebbcedb09"}
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 0x2cd7203b132356426f26d081ea1104038ca6027e2b6140248c890e845c9bec0e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce17554d-300f-4684-ae29-1b8ebbcedb09.json and https://artists.proofprofile.net/proofs/artist/ce17554d-300f-4684-ae29-1b8ebbcedb09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0x2cd7203b132356426f26d081ea1104038ca6027e2b6140248c890e845c9bec0e","name":"Orquestra Popular Marafreboi","registered_at":"2026-06-21T00:04:00Z","symbol":"NIM1757616","token_address":"0xae9f3255ceb9ccc730421dd9ac5d3b75dcf63dac","type":"artist","uuid":"ce17554d-300f-4684-ae29-1b8ebbcedb09"}
album: Música Instrumental Brasileira
  type: MusicAlbum
  date published: 2007-06-20
  track: Carabina
    type: MusicRecording
    duration: PT2M18S
    duration ms: 138186
    explicit: false
    by artist: Orquestra Popular Marafreboi
    in album: Música Instrumental Brasileira
      type: MusicAlbum
      date published: 2007-06-20
    isrc code: BROAQ9700025
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T18:41:52+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x97284236fe28f719b52dde02b472f3373dc71d6d6796aedd65591ae84629df99
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959052
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959052
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROAQ9700025
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T21:44:19Z
    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 0x97284236fe28f719b52dde02b472f3373dc71d6d6796aedd65591ae84629df99. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:44:19Z), 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/BROAQ9700025.
      date published: 2026-07-21T21:44:19Z
    audio: Carabina
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 149.574
      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: 0.523
      additional property: Energy
        type: PropertyValue
        value: 0.615
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.107
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.744
      additional property: Liveness
        type: PropertyValue
        value: 0.193
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.922
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.187
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Nino, o Pernambuquinho
    type: MusicRecording
    duration: PT3M17S
    duration ms: 197986
    explicit: false
    by artist: Orquestra Popular Marafreboi
    in album: Música Instrumental Brasileira
      type: MusicAlbum
      date published: 2007-06-20
    isrc code: BROAQ9700023
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T12:39:05+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x36c0b584104256f715bf6859f651b2bb280a677c843ba4454133d3aeb8700cc8
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958736
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958736
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BROAQ9700023
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T15:41:45Z
    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 0x36c0b584104256f715bf6859f651b2bb280a677c843ba4454133d3aeb8700cc8. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:41:45Z), 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/BROAQ9700023.
      date published: 2026-07-19T15:41:45Z
    audio: Nino, o Pernambuquinho
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 158.235
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.485
      additional property: Energy
        type: PropertyValue
        value: 0.624
      additional property: Speechiness
        type: PropertyValue
        value: 0.096
      additional property: Acousticness
        type: PropertyValue
        value: 0.556
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.739
      additional property: Liveness
        type: PropertyValue
        value: 0.27
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.843
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.188
      additional property: Key Name
      additional property: Mode Name
album: Marafreboi - Orquestra Popular

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

Marafreboi - Orquestra Popular
type: MusicAlbum
date published: 2022-03-16