Checo may refer to: People Alejandro Martínez Flores (born 2004), Spanish footballer, known as Checo Checo Acosta (born 1965), Colombian folk singer Luis Manuel López Checo (born 1983), Dominican
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 0x4c1c3ae2ce2ef98c96589f7d6b3a6e011791a90c00e1f8c52d6215fe910eab45. 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/6b480b4f-0a2b-4686-a14c-0364674555b5.json and https://artists.proofprofile.net/proofs/artist/6b480b4f-0a2b-4686-a14c-0364674555b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).