Juan Humberto Rois Zúñiga (December 25, 1958 – November 21, 1994, popularly known as Juancho Rois and nicknamed El Conejo (the rabbit) was a Colombian vallenato musician, accordionist, and composer.El
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd587daefc01422351b1df38887bdd5ee1957fca69062a262a32ccb83c6cb29. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b552474f-f1cf-42e0-b1d5-d022095f329d.json and https://artists.proofprofile.net/proofs/artist/b552474f-f1cf-42e0-b1d5-d022095f329d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.