Polly Ferman
type: MusicGroup
genre: folklore argentino
genre: tango
description: Polly Ferman (born October 21, 1944, Montevideo, Uruguay) is an Uruguayan pianist, classical musician, music director and producer. She has performed as a solo pianist since 1947 and recorded more th
popularity: 4
followers: 206
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x6e45f16ffca86ff58d43a79af1790992b29c6a83e849b5e903bca7c092da0cce
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8a0eff40-ed0b-4e5a-b649-62fa67434bf3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8a0eff40-ed0b-4e5a-b649-62fa67434bf3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8a0eff40-ed0b-4e5a-b649-62fa67434bf3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6e45f16ffca86ff58d43a79af1790992b29c6a83e849b5e903bca7c092da0cce","name":"Polly Ferman","registered_at":"2026-06-17T13:47:50Z","symbol":"NIM1414443","token_address":"0xe685cef772ac56a5c9f5329194235714d777ebe5","type":"artist","uuid":"8a0eff40-ed0b-4e5a-b649-62fa67434bf3"}
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 0x6e45f16ffca86ff58d43a79af1790992b29c6a83e849b5e903bca7c092da0cce. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a0eff40-ed0b-4e5a-b649-62fa67434bf3.json and https://artists.proofprofile.net/proofs/artist/8a0eff40-ed0b-4e5a-b649-62fa67434bf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
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album: Piano Music by Ernesto Nazareth
  type: MusicAlbum
  date published: 1987-01-01
album: Waltzes of the Americas
  type: MusicAlbum
  date published: 1990-01-01
album: Waltzes of the Americas
  type: MusicAlbum
  date published: 1991
album: Habaneras, Milongas, Tangos
  type: MusicAlbum
  date published: 1994-01-01
album: Ernesto Lecuona -Danzas Cubanas
  type: MusicAlbum
  date published: 1995-01-01
album: Argentine Piano Music
  type: MusicAlbum
  date published: 1997-01-01
album: Habaneras, Milongas, Tangos
  type: MusicAlbum
  date published: 2000
album: Música para piano de Ariel Ramírez
  type: MusicAlbum
  date published: 2000-01-01
album: Polly Ferman's GlamourTango (Tango In Feminine Form)
  type: MusicAlbum
  date published: 2013
album: Orquestango
  type: MusicAlbum
  date published: 2013-10-11