Sá
type: MusicGroup
description: Sá is a Portuguese and Galician surname, derived from places in Portugal and Galicia named Sá or Sa. People Alfredo de Sá, Portuguese politician and Prime Minister during the First Republic André Sá,
popularity: 2
followers: 30
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6dff8ac581323c454d54300168ab0e7b422a573bb9721ec586ab86cb5be3faa9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/85588a06-069f-4e58-a626-c02308f8fd1f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/85588a06-069f-4e58-a626-c02308f8fd1f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/85588a06-069f-4e58-a626-c02308f8fd1f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6dff8ac581323c454d54300168ab0e7b422a573bb9721ec586ab86cb5be3faa9","name":"Sá","registered_at":"2026-06-17T12:05:40Z","symbol":"NIM1390144","token_address":"0x6045f84961501d9575524748a97fa10205d8a313","type":"artist","uuid":"85588a06-069f-4e58-a626-c02308f8fd1f"}
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 0x6dff8ac581323c454d54300168ab0e7b422a573bb9721ec586ab86cb5be3faa9. 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/85588a06-069f-4e58-a626-c02308f8fd1f.json and https://artists.proofprofile.net/proofs/artist/85588a06-069f-4e58-a626-c02308f8fd1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x6dff8ac581323c454d54300168ab0e7b422a573bb9721ec586ab86cb5be3faa9","name":"Sá","registered_at":"2026-06-17T12:05:40Z","symbol":"NIM1390144","token_address":"0x6045f84961501d9575524748a97fa10205d8a313","type":"artist","uuid":"85588a06-069f-4e58-a626-c02308f8fd1f"}