Guimarães
type: MusicGroup
description: thumb|The Toural Square in 1864 thumb|The Toural Square in 2009 Guimarães is a city and municipality located in northern Portugal. Its historic town centre has been listed as a UNESCO World Heritage S
popularity: 5
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2970729e32dc01c094a15438d269b2caca000eebdf8230394675c2e3ecfd9f69
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953877
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953877
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/053d2994-2ab6-44b0-873b-170efd60bc87.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/053d2994-2ab6-44b0-873b-170efd60bc87.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/053d2994-2ab6-44b0-873b-170efd60bc87
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:39:16Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2970729e32dc01c094a15438d269b2caca000eebdf8230394675c2e3ecfd9f69","name":"Guimarães","registered_at":"2026-06-15T15:20:33Z","symbol":"NIM0749426","token_address":"0x2c0cad0e4c482b5ed39223267bed3630efbbec5d","type":"artist","uuid":"053d2994-2ab6-44b0-873b-170efd60bc87"}
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 0x2970729e32dc01c094a15438d269b2caca000eebdf8230394675c2e3ecfd9f69. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/053d2994-2ab6-44b0-873b-170efd60bc87.json and https://artists.proofprofile.net/proofs/artist/053d2994-2ab6-44b0-873b-170efd60bc87.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x2970729e32dc01c094a15438d269b2caca000eebdf8230394675c2e3ecfd9f69","name":"Guimarães","registered_at":"2026-06-15T15:20:33Z","symbol":"NIM0749426","token_address":"0x2c0cad0e4c482b5ed39223267bed3630efbbec5d","type":"artist","uuid":"053d2994-2ab6-44b0-873b-170efd60bc87"}
album: PARTY
  type: MusicAlbum
  date published: 2025-05-06