thumb|Penelope. Drawing after Attic pottery figure. thumb|Penelope encounters the returned Odysseus posing as a beggar. From a mural in the Macellum of Pompeii Penelope ( ; Ancient Greek: Πηνελόπεια,
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 0x3274fe9b54df46f72444276f1fbf30cd05f52247f3b7501e7642920003ea3f2b. 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/73896903-e189-41a8-a84e-74eb2e7882b0.json and https://artists.proofprofile.net/proofs/artist/73896903-e189-41a8-a84e-74eb2e7882b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).