Masahiro Sugaya
type: MusicGroup
genre: ambient
genre: minimalism
popularity: 18
followers: 3752
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6eb9400e1ef0eccfab952b7e3aac6a4d1425185d12abc645687d6c1c5c49cc1a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953733
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953733
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/96eda552-ef3e-45f2-b758-e3814c475e14.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/96eda552-ef3e-45f2-b758-e3814c475e14.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/96eda552-ef3e-45f2-b758-e3814c475e14
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T03:12:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6eb9400e1ef0eccfab952b7e3aac6a4d1425185d12abc645687d6c1c5c49cc1a","name":"Masahiro Sugaya","registered_at":"2026-06-14T20:20:34Z","symbol":"NIM0565612","token_address":"0xc62a4f1680b5ca89f0a368389d64cdd1587eed14","type":"artist","uuid":"96eda552-ef3e-45f2-b758-e3814c475e14"}
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 0x6eb9400e1ef0eccfab952b7e3aac6a4d1425185d12abc645687d6c1c5c49cc1a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96eda552-ef3e-45f2-b758-e3814c475e14.json and https://artists.proofprofile.net/proofs/artist/96eda552-ef3e-45f2-b758-e3814c475e14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T04:47:56Z
  text: {"copyright_id":"0x6eb9400e1ef0eccfab952b7e3aac6a4d1425185d12abc645687d6c1c5c49cc1a","name":"Masahiro Sugaya","registered_at":"2026-06-14T20:20:34Z","symbol":"NIM0565612","token_address":"0xc62a4f1680b5ca89f0a368389d64cdd1587eed14","type":"artist","uuid":"96eda552-ef3e-45f2-b758-e3814c475e14"}
album: 海の動物園
  type: MusicAlbum
  date published: 1987
album: 青
  type: MusicAlbum
  date published: 2016-08-19
album: KOTAM
  type: MusicAlbum
  date published: 2016-08-19
album: 春昼
  type: MusicAlbum
  date published: 2016-08-19
album: STONE AGE
  type: MusicAlbum
  date published: 2017-12-20
album: Horizon, Volume 1
  type: MusicAlbum
  date published: 2019-10-11
  track: Horizon (Intro)
    type: MusicRecording
    duration: PT0M50S
    duration ms: 50373
    explicit: false
    by artist: Masahiro Sugaya
    in album: Horizon, Volume 1
      type: MusicAlbum
      date published: 2019-10-11
    genre: ambient
    genre: minimalism
    isrc code: USDEA1859801
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T12:56:34+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd930eb3e39ab4e054386a65e77092de5738b88e9ae5b01c65defe15f713acb35
    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/USDEA1859801
    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 0xd930eb3e39ab4e054386a65e77092de5738b88e9ae5b01c65defe15f713acb35. 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/USDEA1859801.
      date published: 2026-07-05T19:27:56Z
    audio: Horizon (Intro)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 72.325
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.876
      additional property: Energy
        type: PropertyValue
        value: 0.019
      additional property: Speechiness
        type: PropertyValue
        value: 0.354
      additional property: Acousticness
        type: PropertyValue
        value: 0.984
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.877
      additional property: Liveness
        type: PropertyValue
        value: 0.064
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.815
      additional property: Loudness (dB)
        type: PropertyValue
        value: -20.68
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Future Green
    type: MusicRecording
    duration: PT6M53S
    duration ms: 413960
    explicit: false
    by artist: Masahiro Sugaya
    in album: Horizon, Volume 1
      type: MusicAlbum
      date published: 2019-10-11
    genre: ambient
    genre: minimalism
    isrc code: USDEA1859802
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T08:32:24+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x703c13ea5a40955b1427ee4552948634887df3b09bae446cb2695bc7317abdc9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957681
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957681
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDEA1859802
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T09:09:02Z
    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 0x703c13ea5a40955b1427ee4552948634887df3b09bae446cb2695bc7317abdc9. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/USDEA1859802.
      date published: 2026-07-12T09:09:02Z
    audio: Future Green
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 217.774
      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: 0.239
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
  track: Afternoon of the Appearing Fish
  track: Grain of Sand by the Sea
  track: Straight Line Floating in the Sky
  track: Wind Conversation
album: Horizon, Vol. 1
album: Au. Pt. C
track: Umi No Sunatsubu

Umi No Sunatsubu
type: MusicRecording
duration: PT1M12S
duration ms: 72146
explicit: false
by artist: Masahiro Sugaya
in album: Kankyō Ongaku: Japanese Ambient, Environmental & New Age Music 1980-1990
  type: MusicAlbum
  date published: 2019-02-15
isrc code: USDEA1816722
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T06:55:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x20345549c66fa126837b966e5cd550e0dbe907633b20e285b9f0c2b84486d255
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/USDEA1816722
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956889
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-06T06:56:49+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20345549c66fa126837b966e5cd550e0dbe907633b20e285b9f0c2b84486d255. 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/USDEA1816722.
  date published: 2026-07-06T06:56:49Z
audio: Umi No Sunatsubu
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 108.754
  additional property: Musical Key
    type: PropertyValue
    value: 1
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.579
  additional property: Energy
    type: PropertyValue
    value: 0.517
  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.121
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.924
  additional property: Liveness
    type: PropertyValue
    value: 0.234
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.845
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.983
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Energy
type: PropertyValue
value: 0.074

Speechiness
type: PropertyValue
value: 0.045

Acousticness
type: PropertyValue
value: 0.979

Instrumentalness
type: PropertyValue
value: 0.768

Liveness
type: PropertyValue
value: 0.055

Valence (Positivity)
type: PropertyValue
value: 0.142

Loudness (dB)
type: PropertyValue
value: -15.483

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Major

Afternoon of the Appearing Fish
type: MusicRecording
duration: PT9M37S
duration ms: 577906
explicit: false
by artist: Masahiro Sugaya
in album: Horizon, Volume 1
  type: MusicAlbum
  date published: 2019-10-11
genre: ambient
genre: minimalism
isrc code: USDEA1859803
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-19T14:20:12+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa43eb20eb562b25655b2dd8c6c355c4414f29be0915114927cd70aecca0ad65d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958749
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958749
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDEA1859803
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-19T15:48:23Z
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 0xa43eb20eb562b25655b2dd8c6c355c4414f29be0915114927cd70aecca0ad65d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDEA1859803.
  date published: 2026-07-19T15:48:23Z
audio: Afternoon of the Appearing Fish
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.018
  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: 0.375
  additional property: Energy
    type: PropertyValue
    value: 0.034
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.978
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.915
  additional property: Liveness
    type: PropertyValue
    value: 0.096
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.175
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.211
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Grain of Sand by the Sea
type: MusicRecording
duration: PT1M54S
duration ms: 114893
explicit: false
by artist: Masahiro Sugaya
in album: Horizon, Volume 1
  type: MusicAlbum
  date published: 2019-10-11
genre: ambient
genre: minimalism
isrc code: USDEA1859804
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-05T13:51:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf9a8acbd493fe87693e2e561fcabf0b9b1f28f84304ca9ac18c5ceda0f74e0f3
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/USDEA1859804
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 0xf9a8acbd493fe87693e2e561fcabf0b9b1f28f84304ca9ac18c5ceda0f74e0f3. 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/USDEA1859804.
  date published: 2026-07-05T19:27:56Z
audio: Grain of Sand by the Sea
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 104.107
  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: 0.48
  additional property: Energy
    type: PropertyValue
    value: 0.752
  additional property: Speechiness
    type: PropertyValue
    value: 0.038
  additional property: Acousticness
    type: PropertyValue
    value: 0.028
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.886
  additional property: Liveness
    type: PropertyValue
    value: 0.182
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.518
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.502
  additional property: Key Name
    type: PropertyValue
    value: C#
  additional property: Mode Name
    type: PropertyValue
    value: Major

Straight Line Floating in the Sky
type: MusicRecording
duration: PT8M33S
duration ms: 513413
explicit: false
by artist: Masahiro Sugaya
in album: Horizon, Volume 1
  type: MusicAlbum
  date published: 2019-10-11
genre: ambient
genre: minimalism
isrc code: USDEA1859805
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-18T20:19:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f2d5cfbc2dc7df3584d09281692a23bdb7dd259b264f666a8f2f405bc667f1f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 958607
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/958607
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDEA1859805
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-18T21:01:11Z
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 0x4f2d5cfbc2dc7df3584d09281692a23bdb7dd259b264f666a8f2f405bc667f1f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USDEA1859805.
  date published: 2026-07-18T21:01:11Z
audio: Straight Line Floating in the Sky
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 160.204
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 3
  additional property: Danceability
    type: PropertyValue
    value: 0.522
  additional property: Energy
    type: PropertyValue
    value: 0.38
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.899
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.949
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Horizon, Volume 1
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Horizon, Vol. 1
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Au. Pt. C
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