thumb|400px|El Jaleo, John Singer Sargent, 1882 A jaleo is a feature of flamenco performance that involves rhythmic hand-clapping and vocal interjections used to encourage and support the performer
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 0x3a73f13e045059ac0172c715bd10c06bde32c991f4a73a21bc13def7a5c6054e. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4c27e87-41a7-4698-9b80-9cbc2e0463b3.json and https://artists.proofprofile.net/proofs/artist/a4c27e87-41a7-4698-9b80-9cbc2e0463b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).