Leona Mitchell
type: MusicGroup
genre: opera
description: Leona Pearl Mitchell (born October 13, 1949, Enid, Oklahoma) is an American operatic soprano who sang for 18 seasons as a leading spinto soprano at the Metropolitan Opera in New York. In her home sta
popularity: 4
followers: 234
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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additional property: OTSVerificationAPI
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921ab0719974084fb35c3e421fe7f5525eb111e31d659935439d4ef805425765. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b77886b2-28b9-4e6b-9f16-2ba42ff1064e.json and https://artists.proofprofile.net/proofs/artist/b77886b2-28b9-4e6b-9f16-2ba42ff1064e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
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track: Porgy and Bess / Act 1: "They Pass By Singin'...Here Comes Big Boy!...Don't You Ever Let a Woman Grieve You"
  type: MusicRecording
  duration: PT8M45S
  duration ms: 525973
  explicit: false
  by artist: George Gershwin
  by artist: Willard White
  by artist: McHenry Boatwright
  by artist: James Vincent Pickens
  by artist: Arthur Thompson
  by artist: Christopher Deane
  by artist: Florence Quivar
  by artist: Leona Mitchell
  by artist: Samuel Hagan
  by artist: Francois Clemmons
  by artist: William Brown
  by artist: The Cleveland Orchestra Chorus
  by artist: The Cleveland Orchestra
  by artist: Lorin Maazel
  in album: Gershwin: Porgy & Bess
    type: MusicAlbum
    date published: 1976-01-01
  isrc code: GBF077540205
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077540205
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T20:09:33Z
  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 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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2277a766308cdb399919937523a83279d13281c5e00efc52329bf571dea6ba05. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBF077540205.
    date published: 2026-07-30T20:09:33Z
  audio: Porgy and Bess / Act 1: "They Pass By Singin'...Here Comes Big Boy!...Don't You Ever Let a Woman Grieve You"
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    additional property: Danceability
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    additional property: Liveness
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    additional property: Valence (Positivity)
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track: Porgy and Bess / Act 1: "O, Little Stars...Touch That Money an' Meet Yo' Gawd!"
  type: MusicRecording
  duration: PT3M57S
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  explicit: false
  by artist: George Gershwin
  by artist: Willard White
  by artist: Christopher Deane
  by artist: James Vincent Pickens
  by artist: McHenry Boatwright
  by artist: Barbara Conrad
  by artist: Francois Clemmons
  by artist: Florence Quivar
  by artist: Leona Mitchell
  by artist: The Cleveland Orchestra Chorus
  by artist: The Cleveland Orchestra
  by artist: Lorin Maazel
  in album: Gershwin: Porgy & Bess
    type: MusicAlbum
    date published: 1976-01-01
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    type: PropertyValue
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  additional property: OTSTimestamp
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  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 0x22ba8ff4b30b0776550af0a8d730da34a2d4a409e12a0cebb686c4ccf61422d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBF077540206.
    date published: 2026-07-08T03:20:19Z
  audio: Porgy and Bess / Act 1: "O, Little Stars...Touch That Money an' Meet Yo' Gawd!"
    type: AudioObject
    additional property: Tempo (BPM)
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      value: 173.421
    additional property: Musical Key
      type: PropertyValue
      value: 11
    additional property: Mode (Major/Minor)
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    additional property: Time Signature
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    additional property: Danceability
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track: Porgy and Bess / Act 1: "Wake Up An' Hit It Out!...That You, Sportin'Life?"
track: Porgy and Bess / Act 1: "Headin' For the Promis' Lan'"
track: Porgy and Bess / Act 2: "Bess, You Is My Woman Now"
track: Porgy and Bess / Act 2: "I Loves You, Porgy"

Danceability
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value: 0.276

Energy
type: PropertyValue
value: 0.413

Speechiness
type: PropertyValue
value: 0.093

Acousticness
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value: 0.896

Instrumentalness
type: PropertyValue
value: 0.074

Liveness
type: PropertyValue
value: 0.608

Valence (Positivity)
type: PropertyValue
value: 0.153

Loudness (dB)
type: PropertyValue
value: -18.279

Key Name
type: PropertyValue
value: B

Mode Name
type: PropertyValue
value: Minor

Porgy and Bess / Act 1: "Wake Up An' Hit It Out!...That You, Sportin'Life?"
type: MusicRecording
duration: PT4M27S
duration ms: 267426
explicit: false
by artist: George Gershwin
by artist: Leona Mitchell
by artist: McHenry Boatwright
by artist: Francois Clemmons
by artist: Barbara Conrad
by artist: The Cleveland Orchestra
by artist: Lorin Maazel
in album: Gershwin: Porgy & Bess
  type: MusicAlbum
  date published: 1976-01-01
isrc code: GBF077540207
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: OTSHash
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077540207
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
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 0x24d57c0e94ac8d2f88b9248f6158e23a69e80ad4ad739ebd3b346c8ab5e3eef3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF077540207.
  date published: 2026-07-08T03:22:41Z
audio: Porgy and Bess / Act 1: "Wake Up An' Hit It Out!...That You, Sportin'Life?"
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.014
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
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Porgy and Bess / Act 1: "Headin' For the Promis' Lan'"
type: MusicRecording
duration: PT4M31S
duration ms: 271626
explicit: false
by artist: George Gershwin
by artist: Leona Mitchell
by artist: James Vincent Pickens
by artist: Florence Quivar
by artist: Arthur Thompson
by artist: William Brown
by artist: Robert Snook
by artist: Ralph Neally
by artist: Barbara Conrad
by artist: Isola Jones
by artist: The Cleveland Orchestra Chorus
by artist: The Cleveland Orchestra
by artist: Lorin Maazel
in album: Gershwin: Porgy & Bess
  type: MusicAlbum
  date published: 1976-01-01
isrc code: GBF077540212
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T18:07:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5d227a662f64495ae8f03c0e3b75f919c928ef21099c2facbb190a3eebbcb463
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960448
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077540212
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T18:48:12Z
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
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  date published: 2026-07-31T18:48:12Z
audio: Porgy and Bess / Act 1: "Headin' For the Promis' Lan'"
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Porgy and Bess / Act 2: "Bess, You Is My Woman Now"
type: MusicRecording
duration: PT4M42S
duration ms: 282706
explicit: false
by artist: George Gershwin
by artist: Willard White
by artist: Leona Mitchell
by artist: The Cleveland Orchestra
by artist: Lorin Maazel
in album: Gershwin: Porgy & Bess
  type: MusicAlbum
  date published: 1976-01-01
isrc code: GBF077540217
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T02:37:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7b39bec7153f9d395072441f776c8d845fb0fa3d68a79d08f1d5f2cd5d6536f7
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077540217
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
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 0x7b39bec7153f9d395072441f776c8d845fb0fa3d68a79d08f1d5f2cd5d6536f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF077540217.
  date published: 2026-07-08T03:53:27Z
audio: Porgy and Bess / Act 2: "Bess, You Is My Woman Now"
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Key Name
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Porgy and Bess / Act 2: "I Loves You, Porgy"
type: MusicRecording
duration: PT3M26S
duration ms: 206266
explicit: false
by artist: George Gershwin
by artist: Leona Mitchell
by artist: Willard White
by artist: The Cleveland Orchestra
by artist: Lorin Maazel
in album: Gershwin: Porgy & Bess
  type: MusicAlbum
  date published: 1976-01-01
isrc code: GBF077540226
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077540226
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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 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 0x487e9ec7c8af48a337c2f16667028083eedaf5df74d3feeb72c9a82fbb892e46. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBF077540226.
  date published: 2026-07-08T03:20:19Z
audio: Porgy and Bess / Act 2: "I Loves You, Porgy"
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 130.584
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.383
  additional property: Energy
    type: PropertyValue
    value: 0.258
  additional property: Speechiness
    type: PropertyValue
    value: 0.055
  additional property: Acousticness
    type: PropertyValue
    value: 0.955
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.218
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.159
  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.291
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major