thumb|upright=1.35|The Golden Age by Pietro da Cortona (Palazzo Pitti, Florence, Italy) The term Golden Age comes from Greek mythology, particularly the Works and Days of Hesiod, and is part of the 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 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 0xe3d7c6c23859212127e27f0916eba93e4a8abe3d955939f7238e7fe66b2723a5. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f074e297-d6f6-4652-850f-07e6d5c243f5.json and https://artists.proofprofile.net/proofs/artist/f074e297-d6f6-4652-850f-07e6d5c243f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).