thumb|right|200px|Monument to the Chilean roto, Plaza Yungay, Santiago thumb|350px|right|Example of recent expressions of Bolivian irredentism over territorial losses in the War of the Pacific (1879–1
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 0x8203bcd798eb0f51ce4fcbde4cf9670c4df8fe10615612bfa97e3075a7010a00. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e98b32e-2e99-4bfd-ad36-298c02d1aba4.json and https://artists.proofprofile.net/proofs/artist/9e98b32e-2e99-4bfd-ad36-298c02d1aba4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).