Mackfirst
type: MusicGroup
genre: pinoy hip hop
popularity: 17
followers: 968
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb17dad1e76c211706b328781b3cdb7cda0c67458c3118d44723d15cff81b1b6d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953657
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953657
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ff0a09d-b44f-4524-85c7-4e49eea13f07.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ff0a09d-b44f-4524-85c7-4e49eea13f07.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4ff0a09d-b44f-4524-85c7-4e49eea13f07
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:43:25Z
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 0xb17dad1e76c211706b328781b3cdb7cda0c67458c3118d44723d15cff81b1b6d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff0a09d-b44f-4524-85c7-4e49eea13f07.json and https://artists.proofprofile.net/proofs/artist/4ff0a09d-b44f-4524-85c7-4e49eea13f07.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T16:43:25Z
album: ayoko nang dayain pa
  type: MusicAlbum
  date published: 2021-06-24
  track: ayoko nang dayain pa
    type: MusicRecording
    duration: PT5M23S
    duration ms: 323487
    explicit: false
    by artist: Mackfirst
    in album: ayoko nang dayain pa
      type: MusicAlbum
      date published: 2021-06-24
    genre: pinoy hip hop
    isrc code: QZNWT2151569
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T15:32:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x95ac6e3729d708ec29de695f59ab9a897e40cf33f05763de4e6cdf47cc84851a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958444
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958444
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2151569
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:12:23Z
    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 0x95ac6e3729d708ec29de695f59ab9a897e40cf33f05763de4e6cdf47cc84851a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWT2151569.
      date published: 2026-07-17T19:12:23Z
    audio: ayoko nang dayain pa
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 75.141
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.59
      additional property: Energy
        type: PropertyValue
        value: 0.493
      additional property: Speechiness
        type: PropertyValue
        value: 0.053
      additional property: Acousticness
        type: PropertyValue
        value: 0.309
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.094
      additional property: Liveness
        type: PropertyValue
        value: 0.094
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.445
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.172
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: ikaw
  type: MusicAlbum
  date published: 2021-09-26
album: kahit di para sakin
  type: MusicAlbum
  date published: 2021-10-11
  track: kahit di para sakin
    type: MusicRecording
    duration: PT7M3S
    duration ms: 423340
    explicit: false
    by artist: Mackfirst
    in album: kahit di para sakin
      type: MusicAlbum
      date published: 2021-10-11
    genre: pinoy hip hop
    isrc code: QZNWT2151567
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T03:55:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x8016adc622d369406db974a2d56166b98b412021cb6cb5663687178b12b38081
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958245
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958245
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2151567
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T06:58:11Z
    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 0x8016adc622d369406db974a2d56166b98b412021cb6cb5663687178b12b38081. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:11Z), 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/QZNWT2151567.
      date published: 2026-07-16T06:58:11Z
    audio: kahit di para sakin
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 129.993
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.462
      additional property: Energy
        type: PropertyValue
        value: 0.504
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.487
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.109
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Mackfirst (iniibig kita)
album: Babalik
album: Balang araw
album: Tara na
album: Kunwari tayo
album: Bakit kapa bumabalik
album: baliw sayo
album: Kung napapagod kana
album: Sayo lang
album: Payakap Muna
album: aasa pa ba
album: Babawiin na kita
album: Ako nalang ang lalayo
album: Nandito lang ako
album: Kung di na ako
album: Sinungaling ka
album: Tayo pa ba
album: Dito ka muna
album: Di ako manhid
album: Maging tayo pa sana
album: Bati na tayo
album: Kung kailan wala kana
album: Baka pwede pa
album: Tatlong taon
album: Di ko pala kaya
album: Alam ko naman
album: Isang patawad lang
album: Pipiliin parin kita
album: Bakit iniwan mo ko
album: Nagbago kana
album: Miss na kita
album: oras
album: Malaya ka na
album: Di mapapagod
album: Bakit mahal parin kita
album: Liwanag ng pasko
album: Itigil na natin
album: Kung maibabalik ko lang
album: Sobrang sakit pala
album: Paano na tayo
album: Salamat ama
album: toxic
album: Akala ko
album: Di mo na ako kailangan
album: Tuloy mo lang
album: Kita mo naman
album: Kailangan kita "pero kasama mo sya"
album: Bonmala
album: Sama-sama Ngayong Pasko
album: Kahit walang tayo
album: Guni Guni mo lang
album: inggit

Valence (Positivity)
type: PropertyValue
value: 0.554

Loudness (dB)
type: PropertyValue
value: -9.583

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Minor

Mackfirst (iniibig kita)
type: MusicAlbum
date published: 2021-10-13

Babalik
type: MusicAlbum
date published: 2021-10-14

Balang araw
type: MusicAlbum
date published: 2021-10-27

Tara na
type: MusicAlbum
date published: 2021-12-28

Kunwari tayo
type: MusicAlbum
date published: 2021-12-28

Bakit kapa bumabalik
type: MusicAlbum
date published: 2022-03-05

baliw sayo
type: MusicAlbum
date published: 2022-03-05

Kung napapagod kana
type: MusicAlbum
date published: 2022-03-05

Sayo lang
type: MusicAlbum
date published: 2022-05-22

Payakap Muna
type: MusicAlbum
date published: 2022-05-22

aasa pa ba
type: MusicAlbum
date published: 2022-05-22

Babawiin na kita
type: MusicAlbum
date published: 2022-06-21

Ako nalang ang lalayo
type: MusicAlbum
date published: 2022-06-21

Nandito lang ako
type: MusicAlbum
date published: 2022-06-30

Kung di na ako
type: MusicAlbum
date published: 2022-07-09

Sinungaling ka
type: MusicAlbum
date published: 2022-07-24

Tayo pa ba
type: MusicAlbum
date published: 2022-09-01

Dito ka muna
type: MusicAlbum
date published: 2022-09-01

Di ako manhid
type: MusicAlbum
date published: 2022-09-18

Maging tayo pa sana
type: MusicAlbum
date published: 2022-10-07
track: Maging tayo pa sana
  type: MusicRecording
  duration: PT4M32S
  duration ms: 272111
  explicit: false
  by artist: Mackfirst
  in album: Maging tayo pa sana
    type: MusicAlbum
    date published: 2022-10-07
  genre: pinoy hip hop
  isrc code: QZRP42250563
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-17T22:53:16+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd0ec457f77c82ab3bb6f17ed0b778edc30aa7f5f036df9d6ade81cdd313fcf22
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958489
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958489
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42250563
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-18T04:13:26Z
  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 0xd0ec457f77c82ab3bb6f17ed0b778edc30aa7f5f036df9d6ade81cdd313fcf22. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZRP42250563.
    date published: 2026-07-18T04:13:26Z
  audio: Maging tayo pa sana
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 130.034
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.576
    additional property: Energy
      type: PropertyValue
      value: 0.468
    additional property: Speechiness
      type: PropertyValue
      value: 0.028
    additional property: Acousticness
      type: PropertyValue
      value: 0.181
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.149
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.402
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.493
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Major

Bati na tayo
type: MusicAlbum
date published: 2022-10-07

Kung napapagod kana
type: MusicAlbum
date published: 2022-12-18

Kung kailan wala kana
type: MusicAlbum
date published: 2023-03-04
track: Kung kailan wala kana
  type: MusicRecording
  duration: PT4M6S
  duration ms: 246911
  explicit: false
  by artist: Mackfirst
  in album: Kung kailan wala kana
    type: MusicAlbum
    date published: 2023-03-04
  genre: pinoy hip hop
  isrc code: QZES72307937
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-11T13:14:23+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc67de117db556e59cf619fed70646d2e6d7b075a3033b3bcc1db67807f1f1334
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957576
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957576
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72307937
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-11T14:19:48Z
  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 0xc67de117db556e59cf619fed70646d2e6d7b075a3033b3bcc1db67807f1f1334. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZES72307937.
    date published: 2026-07-11T14:19:48Z
  audio: Kung kailan wala kana
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 94.996
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.718
    additional property: Energy
      type: PropertyValue
      value: 0.596
    additional property: Speechiness
      type: PropertyValue
      value: 0.027
    additional property: Acousticness
      type: PropertyValue
      value: 0.337
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.097
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.405
    additional property: Loudness (dB)
      type: PropertyValue
      value: -10.324
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Baka pwede pa
type: MusicAlbum
date published: 2023-03-21

Tatlong taon
type: MusicAlbum
date published: 2023-03-22

Di ko pala kaya
type: MusicAlbum
date published: 2023-04-25

Alam ko naman
type: MusicAlbum
date published: 2023-05-16

Isang patawad lang
type: MusicAlbum
date published: 2023-05-16

Pipiliin parin kita
type: MusicAlbum
date published: 2023-05-16
track: Pipiliin parin kita
  type: MusicRecording
  duration: PT4M31S
  duration ms: 271656
  explicit: false
  by artist: Mackfirst
  in album: Pipiliin parin kita
    type: MusicAlbum
    date published: 2023-05-16
  genre: pinoy hip hop
  isrc code: QZK6L2334587
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-15T11:04:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf0a488d3a10dac36acde8f17d0880f021814355fbcb071adba416fdb1af37673
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958153
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958153
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6L2334587
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-15T14:04:31Z
  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 0xf0a488d3a10dac36acde8f17d0880f021814355fbcb071adba416fdb1af37673. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:31Z), 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/QZK6L2334587.
    date published: 2026-07-15T14:04:31Z
  audio: Pipiliin parin kita
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 130.018
    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: 0.843
    additional property: Energy
      type: PropertyValue
      value: 0.452
    additional property: Speechiness
      type: PropertyValue
      value: 0.089
    additional property: Acousticness
      type: PropertyValue
      value: 0.293
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.075
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.499
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.884
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major

Bakit iniwan mo ko
type: MusicAlbum
date published: 2023-06-11

Nagbago kana
type: MusicAlbum
date published: 2023-07-12
track: Nagbago kana
  type: MusicRecording
  duration: PT5M15S
  duration ms: 315663
  explicit: false
  by artist: Mackfirst
  in album: Nagbago kana
    type: MusicAlbum
    date published: 2023-07-12
  genre: pinoy hip hop
  isrc code: QZNWT2355105
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T18:52:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0b072fe1509a12740229c0fef6c3ecc495e545d8966ddb20159cc8611a404232
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956826
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956826
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2355105
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T19:27:56Z
  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 0x0b072fe1509a12740229c0fef6c3ecc495e545d8966ddb20159cc8611a404232. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2355105.
    date published: 2026-07-05T19:27:56Z
  audio: Nagbago kana
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 130.053
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.667
    additional property: Energy
      type: PropertyValue
      value: 0.606
    additional property: Speechiness
      type: PropertyValue
      value: 0.026
    additional property: Acousticness
      type: PropertyValue
      value: 0.488
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.109
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.22
    additional property: Loudness (dB)
      type: PropertyValue
      value: -9.081
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Major

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