thumb|right|300px|Members of Colonel Martinez's Search Bloc celebrate over Pablo Escobar's body on December 2, 1993. Escobar's death ended a sixteen-month effort that cost hundreds of millions of doll
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 0xb4b5f3eb8c92f53d0e96033181660dce124a3c4d80a6f32d178094746d5db399. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0df1b935-4486-4d0c-b98c-c55d57f50efb.json and https://artists.proofprofile.net/proofs/artist/0df1b935-4486-4d0c-b98c-c55d57f50efb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.