thumb|A charro on his horse thumb|Female and male charro regalia, including sombreros de charro thumbnail|right|Mexican Charro (1828). Originally, the term "Charro" was a derogatory name for the Mexi
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 0xf0d2437c409aa98ba1f7962468d985630b7dfb8d71a259c7318a8571f8a11a36. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7058eade-34db-4c9b-bc22-608b62334908.json and https://artists.proofprofile.net/proofs/artist/7058eade-34db-4c9b-bc22-608b62334908.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).