Caeiro is a Portuguese surname. Notable people with the surname include: Celeste Caeiro (1933–2024), Portuguese pacifist worker Francisco José Caeiro (1890–1976), Portuguese politician João Caeiro (d
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb000de4a6b1cbca0d6f5bc5574122b1a6ca96f1663a9865292ced8374291b64f. 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/71cd7b27-ecd5-4dad-a67c-401e5514df0a.json and https://artists.proofprofile.net/proofs/artist/71cd7b27-ecd5-4dad-a67c-401e5514df0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).