JAMBINAI
type: MusicGroup
genre: k-rock
genre: post-rock
description: Jambinai () are a South Korean post-rock band formed in Seoul in 2009. The band currently consists of Kim Bo-mi, Lee Il-woo, Sim Eun-yong, Yu Byeong-koo and Choi Jae-hyuk. Their debut album Différance
popularity: 18
followers: 26475
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe408485ef8fed1437913ef39770e0dbb7586e3cbf9058c9cf6c6e86240e8d4cf
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953762
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7fcf151-5204-4827-b653-f9f48d7e3617.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b7fcf151-5204-4827-b653-f9f48d7e3617.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b7fcf151-5204-4827-b653-f9f48d7e3617
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T08:21:23Z
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 0xe408485ef8fed1437913ef39770e0dbb7586e3cbf9058c9cf6c6e86240e8d4cf. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7fcf151-5204-4827-b653-f9f48d7e3617.json and https://artists.proofprofile.net/proofs/artist/b7fcf151-5204-4827-b653-f9f48d7e3617.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
album: Différance
  type: MusicAlbum
  date published: 2012-01-02
album: Differance
  type: MusicAlbum
  date published: 2012-06-15
album: Differance (Remastered)
  type: MusicAlbum
  date published: 2015-04-30
album: They Keep Silence
  type: MusicAlbum
  date published: 2016-03-15
album: They Keep Silence
  type: MusicAlbum
  date published: 2016-03-15
album: They Keep Silence
  type: MusicAlbum
  date published: 2016-04-08
album: For Everything That You Lost
  type: MusicAlbum
  date published: 2016-05-19
album: For Everything That You Lost
  type: MusicAlbum
  date published: 2016-05-19
album: A Hermitage
  type: MusicAlbum
  date published: 2016-06-17
  track: They Keep Silence
    type: MusicRecording
    duration: PT6M24S
    duration ms: 384920
    explicit: false
    by artist: JAMBINAI
    in album: A Hermitage
      type: MusicAlbum
      date published: 2016-06-17
    genre: k-rock
    genre: post-rock
    isrc code: GBBRP1653508
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
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    additional property: CopyrightRegisteredAt
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    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/GBBRP1653508
    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 0x6d84ecde550a9f1c5ef25b10588ae169254e8bc468cd6f15ba5aa62a4032d6e7. 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/GBBRP1653508.
      date published: 2026-07-05T19:27:56Z
    audio: They Keep Silence
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.002
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.56
      additional property: Energy
        type: PropertyValue
        value: 0.881
      additional property: Speechiness
        type: PropertyValue
        value: 0.055
      additional property: Acousticness
        type: PropertyValue
        value: 0.002
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.726
      additional property: Liveness
        type: PropertyValue
        value: 0.163
      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -3.661
      additional property: Key Name
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        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: A Hermitage
  type: MusicAlbum
  date published: 2016-06-17
album: A Hermitage
  type: MusicAlbum
  date published: 2016-06-17
album: A Hermitage
  type: MusicAlbum
  date published: 2016-06-17
album: A Hermitage
  type: MusicAlbum
  date published: 2016-06-17
album: Differance
  type: MusicAlbum
  date published: 2017-02-24
album: Differance
  type: MusicAlbum
  date published: 2017-02-24
album: Differance
  type: MusicAlbum
  date published: 2017-02-24
  track: Time of Extinction
    type: MusicRecording
    duration: PT2M56S
    duration ms: 176697
    explicit: false
    by artist: JAMBINAI
    in album: Differance
      type: MusicAlbum
      date published: 2017-02-24
    genre: k-rock
    genre: post-rock
    isrc code: GBBRP1763201
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
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      value: https://explorer.copyrightchains.com/tx/0x992ba989fd8dfd88c7a0c0b58e3f4e7fbb7bb61f76abed5427e6eb9523a8eb37
    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      value: 956484
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956484
    additional property: OTSVerificationAPI
    additional property: OTSTimestamp
    additional property: OTSVerifyInstructions
    subject of: OpenTimestamps Proof of Existence
    audio: Time of Extinction
album: Rebel: Thief Who Stole the People Pt. 8 (Original Television Soundtrack)
album: Rebel: Thief Who Stole the People, Pt. 8 (Original Soundtrack)
album: Sawtooth
album: Small Consolation / ONDA
album: Sun. Tears. Red
album: 온다
album: ONDA
album: once more from that frozen bottom
album: from the place been erased
album: 발현
album: apparition

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBRP1763201

OTSTimestamp
type: PropertyValue
value: 2026-07-03T10:47:44Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ba989fd8dfd88c7a0c0b58e3f4e7fbb7bb61f76abed5427e6eb9523a8eb37. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBBRP1763201.
date published: 2026-07-03T10:47:44Z

Time of Extinction
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 128.079
additional property: Musical Key
  type: PropertyValue
  value: 11
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 3
additional property: Danceability
  type: PropertyValue
  value: 0.589
additional property: Energy
  type: PropertyValue
  value: 0.59
additional property: Speechiness
  type: PropertyValue
  value: 0.051
additional property: Acousticness
  type: PropertyValue
  value: 0
additional property: Instrumentalness
  type: PropertyValue
  value: 0.936
additional property: Liveness
  type: PropertyValue
  value: 0.075
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.27
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.369
additional property: Key Name
  type: PropertyValue
  value: B
additional property: Mode Name
  type: PropertyValue
  value: Major

Rebel: Thief Who Stole the People Pt. 8 (Original Television Soundtrack)
type: MusicAlbum
date published: 2017-04-16

Rebel: Thief Who Stole the People, Pt. 8 (Original Soundtrack)
type: MusicAlbum
date published: 2017-04-16

Sawtooth
type: MusicAlbum
date published: 2019-03-26

Sawtooth
type: MusicAlbum
date published: 2019-03-26

Small Consolation / ONDA
type: MusicAlbum
date published: 2019-04-15

Small Consolation / ONDA
type: MusicAlbum
date published: 2019-04-15

Sun. Tears. Red
type: MusicAlbum
date published: 2019-05-28

Sun. Tears. Red
type: MusicAlbum
date published: 2019-05-28

온다
type: MusicAlbum
date published: 2019-06-07

ONDA
type: MusicAlbum
date published: 2019-06-07

ONDA
type: MusicAlbum
date published: 2019-06-07
track: Sawtooth
  type: MusicRecording
  duration: PT7M39S
  duration ms: 459403
  explicit: false
  by artist: JAMBINAI
  in album: ONDA
    type: MusicAlbum
    date published: 2019-06-07
  genre: k-rock
  genre: post-rock
  isrc code: GBBRP1991601
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-16T07:43:14+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xf23f304170c67e9cea774a45e13cb6b10a6696d34633f7578bf50f52952eeef6
  additional property: OTSHash
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  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958271
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBRP1991601
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-16T10:44:33Z
  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 0xf23f304170c67e9cea774a45e13cb6b10a6696d34633f7578bf50f52952eeef6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:33Z), 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/GBBRP1991601.
    date published: 2026-07-16T10:44:33Z
  audio: Sawtooth
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 95.072
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.421
    additional property: Energy
      type: PropertyValue
      value: 0.511
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.032
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.868
    additional property: Liveness
      type: PropertyValue
      value: 0.086
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.146
    additional property: Loudness (dB)
      type: PropertyValue
      value: -7.76
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Square Wave
  type: MusicRecording
  duration: PT5M3S
  duration ms: 303372
  explicit: false
  by artist: JAMBINAI
  in album: ONDA
    type: MusicAlbum
    date published: 2019-06-07
  genre: k-rock
  genre: post-rock
  isrc code: GBBRP1991602
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-21T21:43:25+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x86be038a191bec74a6f8fc8074ef0e4fcf36b1344cfd98bef88e2a94ea569ca3
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 959065
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/959065
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBRP1991602
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-22T00:45:29Z
  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 0x86be038a191bec74a6f8fc8074ef0e4fcf36b1344cfd98bef88e2a94ea569ca3. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:29Z), 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/GBBRP1991602.
    date published: 2026-07-22T00:45:29Z
  audio: Square Wave
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 122.064
    additional property: Musical Key
      type: PropertyValue
      value: 4
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.472
    additional property: Energy
      type: PropertyValue
      value: 0.892
    additional property: Speechiness
      type: PropertyValue
      value: 0.107
    additional property: Acousticness
      type: PropertyValue
      value: 0.005
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.078
    additional property: Liveness
      type: PropertyValue
      value: 0.861
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.398
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.166
    additional property: Key Name
      type: PropertyValue
      value: E
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Sun. Tears. Red
  type: MusicRecording
  duration: PT5M51S
  duration ms: 351572
  explicit: false
  by artist: JAMBINAI
  in album: ONDA
    type: MusicAlbum
    date published: 2019-06-07
  genre: k-rock
  genre: post-rock
  isrc code: GBBRP1991604
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-18T18:46:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x6aee7235fd13034a80fa17be66f94d6b091f39d2ee2d10e29f8d221043fa7fca
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958600
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Sun. Tears. Red
track: ONDA

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/958600

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBRP1991604

OTSTimestamp
type: PropertyValue
value: 2026-07-18T19:24:05Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aee7235fd13034a80fa17be66f94d6b091f39d2ee2d10e29f8d221043fa7fca. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBBRP1991604.
date published: 2026-07-18T19:24:05Z

Sun. Tears. Red
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 104.973
additional property: Musical Key
  type: PropertyValue
  value: 4
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.391
additional property: Energy
  type: PropertyValue
  value: 0.703
additional property: Speechiness
  type: PropertyValue
  value: 0.071
additional property: Acousticness
  type: PropertyValue
  value: 0.025
additional property: Instrumentalness
  type: PropertyValue
  value: 0.084
additional property: Liveness
  type: PropertyValue
  value: 0.168
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.169
additional property: Loudness (dB)
  type: PropertyValue
  value: -6.311
additional property: Key Name
  type: PropertyValue
  value: E
additional property: Mode Name
  type: PropertyValue
  value: Major

ONDA
type: MusicRecording
duration: PT7M7S
duration ms: 427787
explicit: false
by artist: JAMBINAI
in album: ONDA
  type: MusicAlbum
  date published: 2019-06-07
genre: k-rock
genre: post-rock
isrc code: GBBRP1991608
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-17T18:35:25+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x00a3c16cf7cce5b9671a865bba3ef302fcefaa312b9e7cf31519179039dab402
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/GBBRP1991608
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
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