Iza Kowalewska
type: MusicGroup
popularity: 17
followers: 763
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7703e0b3849774f1e1bd70d97f27d1421a34e8c76ccb6c64d675a876f020181a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953765
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953765
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc883dac-212c-4211-9b61-ac665e98b4d3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc883dac-212c-4211-9b61-ac665e98b4d3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bc883dac-212c-4211-9b61-ac665e98b4d3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T08:55:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7703e0b3849774f1e1bd70d97f27d1421a34e8c76ccb6c64d675a876f020181a","name":"Iza Kowalewska","registered_at":"2026-06-15T00:24:33Z","symbol":"NIM0623847","token_address":"0x669738f91cefa980bcf160899fc31fa5a3ce37c8","type":"artist","uuid":"bc883dac-212c-4211-9b61-ac665e98b4d3"}
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 0x7703e0b3849774f1e1bd70d97f27d1421a34e8c76ccb6c64d675a876f020181a. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc883dac-212c-4211-9b61-ac665e98b4d3.json and https://artists.proofprofile.net/proofs/artist/bc883dac-212c-4211-9b61-ac665e98b4d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T08:55:24Z
  text: {"copyright_id":"0x7703e0b3849774f1e1bd70d97f27d1421a34e8c76ccb6c64d675a876f020181a","name":"Iza Kowalewska","registered_at":"2026-06-15T00:24:33Z","symbol":"NIM0623847","token_address":"0x669738f91cefa980bcf160899fc31fa5a3ce37c8","type":"artist","uuid":"bc883dac-212c-4211-9b61-ac665e98b4d3"}
album: Diabeł Mi Cię Dał
  type: MusicAlbum
  date published: 2013-01-01
album: Nocna Zmiana
  type: MusicAlbum
  date published: 2015-03-09
album: Los Jak Zegar
  type: MusicAlbum
  date published: 2015-11-13
album: Pod Dachami Paryża
  type: MusicAlbum
  date published: 2016-01-22
track: Nadzieja (feat. Iza Kowalewska)
track: Trudne Szczęścia (feat. Boxi & Iza Kowalewska)
track: My delfiny

Nadzieja (feat. Iza Kowalewska)
type: MusicRecording
duration: PT3M27S
duration ms: 207400
explicit: false
by artist: Czarny HIFI
by artist: Iza Kowalewska
in album: Nokturny & Demony
  type: MusicAlbum
  date published: 2014-10-06
popularity: 14
isrc code: PLC071407002
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-24T12:21:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x0eca3a76927c5f5acc0c69204623f9fb59e6a3c5a50879fccc745c55bfd7d5f7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC071407002
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+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 0x0eca3a76927c5f5acc0c69204623f9fb59e6a3c5a50879fccc745c55bfd7d5f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLC071407002.
  date published: 2026-07-02T03:55:08Z
audio: Nadzieja (feat. Iza Kowalewska)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 106.746
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.819
  additional property: Energy
    type: PropertyValue
    value: 0.404
  additional property: Speechiness
    type: PropertyValue
    value: 0.068
  additional property: Acousticness
    type: PropertyValue
    value: 0.846
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.058
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.295
  additional property: Loudness (dB)
    type: PropertyValue
    value: -12.348
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Trudne Szczęścia (feat. Boxi & Iza Kowalewska)
type: MusicRecording
duration: PT4M22S
duration ms: 262680
explicit: false
by artist: Czarny HIFI
by artist: Boxi
by artist: Iza Kowalewska
in album: Nokturny & Demony
  type: MusicAlbum
  date published: 2014-10-06
popularity: 10
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8071eff51574a27010d1fe394752ecdba9ff272ad89ce0c41d40156242d4bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC071407009.
  date published: 2026-07-29T19:35:34Z
audio: Trudne Szczęścia (feat. Boxi & Iza Kowalewska)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 123.509
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.525
  additional property: Energy
    type: PropertyValue
    value: 0.366
  additional property: Speechiness
    type: PropertyValue
    value: 0.293
  additional property: Acousticness
    type: PropertyValue
    value: 0.461
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.104
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.287
  additional property: Loudness (dB)
    type: PropertyValue
    value: -14.753
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: PLC071407009
additional property: CopyrightID
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: 960138
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-29T19:35:34+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLC071407009
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960138
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960138
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T19:35:34+00:00
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

My delfiny
type: MusicRecording
duration: PT2M0S
duration ms: 120546
explicit: false
by artist: Iza Kowalewska
in album: Najlepsze przeboje rybki Mini Mini (vol. 2)
  type: MusicAlbum
  date published: 2016-05-06
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39578de8b6e2dcfcc80b25bb4cfe7130aee2c98a766a23c85e8e7060d9344a4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/PLA281300205.
  date published: 2026-08-01T01:44:32Z
audio: My delfiny
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 128.889
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.698
  additional property: Energy
    type: PropertyValue
    value: 0.715
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.597
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.362
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.944
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.997
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor
isrc code: PLA281300205
additional property: CopyrightID
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: 960494
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-08-01T01:44:32+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA281300205
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960494
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960494
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-08-01T01:44:32+00:00
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