José Calvário
type: MusicGroup
description: José Carlos Barbosa Calvário (1951, Porto – 17 June 2009, Oeiras) was a Portuguese songwriter and conductor. He was also a composer, and conducted at many Portuguese festivals.Obituary In the Eurov
popularity: 2
followers: 20
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x256949ccd8103ee664f3424a916af8614a50628851df2e8df72eb7dbf60b56f4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8b67b2d-be08-4155-aff8-3f00a0d40968.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e8b67b2d-be08-4155-aff8-3f00a0d40968.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e8b67b2d-be08-4155-aff8-3f00a0d40968
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x256949ccd8103ee664f3424a916af8614a50628851df2e8df72eb7dbf60b56f4","name":"José Calvário","registered_at":"2026-06-21T10:05:29Z","symbol":"NIM1894897","token_address":"0xd172b525c7ba08f0aa1efe235649bb5253b8facf","type":"artist","uuid":"e8b67b2d-be08-4155-aff8-3f00a0d40968"}
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 0x256949ccd8103ee664f3424a916af8614a50628851df2e8df72eb7dbf60b56f4. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8b67b2d-be08-4155-aff8-3f00a0d40968.json and https://artists.proofprofile.net/proofs/artist/e8b67b2d-be08-4155-aff8-3f00a0d40968.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x256949ccd8103ee664f3424a916af8614a50628851df2e8df72eb7dbf60b56f4","name":"José Calvário","registered_at":"2026-06-21T10:05:29Z","symbol":"NIM1894897","token_address":"0xd172b525c7ba08f0aa1efe235649bb5253b8facf","type":"artist","uuid":"e8b67b2d-be08-4155-aff8-3f00a0d40968"}
album: Electronic Symphony
  type: MusicAlbum
  date published: 2010
album: 25 DE ABRIL (Através de dois clássicos revisitados)
  type: MusicAlbum
  date published: 2024-03-22