Grace Matata
type: MusicGroup
genre: afro soul
genre: bongo flava
description: Grace Matata is a Tanzanian afro-soul singer. She released her debut album Nyakati in 2013. Career Matata writes and performs music that is 'a unique blend of Swahili soul, R&B, and jazz.' Her care
popularity: 6
followers: 569
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additional property: CopyrightChainExplorerURL
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad98c09286be47ddfa320eee98456e70f1b304403f6699bc6e9f417044a0a72. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d74d69c-b767-4292-9866-677e037ad3c5.json and https://artists.proofprofile.net/proofs/artist/1d74d69c-b767-4292-9866-677e037ad3c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
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album: Nyakati
  type: MusicAlbum
  date published: 2011-07-19
album: Nyakati
  type: MusicAlbum
  date published: 2013-03-05
track: Nyakati
track: Nyakati Interlude
track: Punchlinez

Nyakati
type: MusicRecording
duration: PT4M44S
duration ms: 284804
explicit: false
by artist: Nikki Mbishi
by artist: Grace Matata
in album: Sauti Ya Jogoo
  type: MusicAlbum
  date published: 2011-07-27
isrc code: TZA1X2200658
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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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1615be524f304542d939ed30f3d8d446a796210ba4f0c0fd44674bb012f3614. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TZA1X2200658.
  date published: 2026-07-02T05:09:12Z
audio: Nyakati
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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    value: 0.572
  additional property: Loudness (dB)
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  additional property: Key Name
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Nyakati Interlude
type: MusicRecording
duration: PT0M42S
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explicit: false
by artist: Nikki Mbishi
by artist: Grace Matata
in album: Sauti Ya Jogoo
  type: MusicAlbum
  date published: 2011-07-27
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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
additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dfa0bddf744c54cd145719ae4fea8f49224e3538e76df2860a35035574bfe4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TZA1X2200661.
  date published: 2026-07-08T08:56:20Z
audio: Nyakati Interlude
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  additional property: Acousticness
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Punchlinez
type: MusicRecording
duration: PT3M42S
duration ms: 222315
explicit: false
by artist: Nikki Mbishi
by artist: Grace Matata
in album: Sauti Ya Jogoo
  type: MusicAlbum
  date published: 2011-07-27
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b5085268dee9fb67fd3821ea6f8a5f6600a7d6a8044d0a1e2d7e921d23a4d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TZA1X2200660.
  date published: 2026-07-31T04:14:58Z
audio: Punchlinez
  type: AudioObject
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  additional property: Mode (Major/Minor)
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  additional property: Loudness (dB)
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    value: -11.207
  additional property: Key Name
    type: PropertyValue
    value: Ab
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    type: PropertyValue
    value: Minor
isrc code: TZA1X2200660
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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