right|thumb|Astaroth illustration from the Dictionnaire Infernal (1818) by Louis Le Breton. In demonology, Astaroth (also Ashtaroth, Astarot and Astetoth) is an arch-demon. He is considered to be the
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 0xe94d84fe6344133593c8bb8ddf41fbd8368efbdf8a1dbc5cbcfc944546870b5f. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a62d14bb-6f81-4b10-9b7a-eeb6844c1e0d.json and https://artists.proofprofile.net/proofs/artist/a62d14bb-6f81-4b10-9b7a-eeb6844c1e0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).