Marshal of the Air Eduardo Gomes (September 20, 1896 – June 13, 1981) was a Brazilian politician and military figure from Petrópolis. thumb|left|The 18 of the fort on their "death march" - Eduardo Go
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 0x43c723e2ea957dec1f9ab2d3bb66615904cd7445276d5c831e2b054f49776be5. 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/5e55cf2d-1547-415c-a4d7-8baaee11fbbd.json and https://artists.proofprofile.net/proofs/artist/5e55cf2d-1547-415c-a4d7-8baaee11fbbd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).