Calixto Leicea
type: MusicGroup
description: Calixto Leicea (1909–2004) was a Cuban musician, arranger and composer. He was featured as a trumpeter of the Sonora Matancera. Category:Cuban musicians Category:1909 births Category:2004 deaths Re
popularity: 10
followers: 14
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xff5f00dca4159494bb246e55b48a2e747e03a56473065acfeaaa408aadb1ab77
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9264835b-2576-46a7-a2bb-65b6c3ca79a7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9264835b-2576-46a7-a2bb-65b6c3ca79a7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9264835b-2576-46a7-a2bb-65b6c3ca79a7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xff5f00dca4159494bb246e55b48a2e747e03a56473065acfeaaa408aadb1ab77","name":"Calixto Leicea","registered_at":"2026-06-17T16:46:17Z","symbol":"NIM1457038","token_address":"0xa2f9bd10ad7822f22e899a83f4c59d78fa5b03fb","type":"artist","uuid":"9264835b-2576-46a7-a2bb-65b6c3ca79a7"}
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 0xff5f00dca4159494bb246e55b48a2e747e03a56473065acfeaaa408aadb1ab77. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9264835b-2576-46a7-a2bb-65b6c3ca79a7.json and https://artists.proofprofile.net/proofs/artist/9264835b-2576-46a7-a2bb-65b6c3ca79a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xff5f00dca4159494bb246e55b48a2e747e03a56473065acfeaaa408aadb1ab77","name":"Calixto Leicea","registered_at":"2026-06-17T16:46:17Z","symbol":"NIM1457038","token_address":"0xa2f9bd10ad7822f22e899a83f4c59d78fa5b03fb","type":"artist","uuid":"9264835b-2576-46a7-a2bb-65b6c3ca79a7"}