Hiwa Seyfizade
type: MusicGroup
description: Hiwa Seyfizade (born November 5, 1997, in Tehran) is an Iranian classical music singer, Tombak player, theater actor and music teacher from Iran. Artistic life Hiwa Seyfizade was born on November 5,
popularity: 2
followers: 207
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa69a73accec4e59529a1e3c3ac1cb7cdf892b407c34ef13b929e12cfdbca37a3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa69a73accec4e59529a1e3c3ac1cb7cdf892b407c34ef13b929e12cfdbca37a3","name":"Hiwa Seyfizade","registered_at":"2026-06-17T09:25:53Z","symbol":"NIM1352041","token_address":"0xd80a34cd60a0d7613cd92a010a29465594408d22","type":"artist","uuid":"7dc6c0b5-fdb2-45b1-83be-f86d6d27a927"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69a73accec4e59529a1e3c3ac1cb7cdf892b407c34ef13b929e12cfdbca37a3. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.json and https://artists.proofprofile.net/proofs/artist/7dc6c0b5-fdb2-45b1-83be-f86d6d27a927.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0xa69a73accec4e59529a1e3c3ac1cb7cdf892b407c34ef13b929e12cfdbca37a3","name":"Hiwa Seyfizade","registered_at":"2026-06-17T09:25:53Z","symbol":"NIM1352041","token_address":"0xd80a34cd60a0d7613cd92a010a29465594408d22","type":"artist","uuid":"7dc6c0b5-fdb2-45b1-83be-f86d6d27a927"}
album: Vay Vatan
  type: MusicAlbum
  date published: 2023-06-23