The Howl () is a 1970 Italian surrealist comedy film co-written and directed by Tinto Brass. It was entered into the 20th Berlin International Film Festival. Cast Tina Aumont as Anita Gigi Proietti
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 0xea0c08580f06b19879534e0fe11501cbe3725b14f4a8da3cab2455c8b914f7b7. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdf7fbba-cfdc-496e-954d-0c0082f59272.json and https://artists.proofprofile.net/proofs/artist/bdf7fbba-cfdc-496e-954d-0c0082f59272.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).