Ratman () is a 1988 Italian exploitation horror film directed by Giuliano Carnimeo. Plot Two models, Marlis and Peggy, are on a Caribbean Island for a photoshoot. One night, Peggy is found dead and
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 0xfff07a35c819cee5849cf0e067be8e401c120445e260091c6e54f115f9fb1bdf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c64dc4c-9a0c-4d1f-b710-505a8d1bdb10.json and https://artists.proofprofile.net/proofs/artist/7c64dc4c-9a0c-4d1f-b710-505a8d1bdb10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988f9c966bb93e5cac4888f653aed8b74a6b8d764aff95ea2e8362d0f29f7428. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:05:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHO2318568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ed1e542986e71510c13464cbe061d7dc1840f489f7b3bafb9b54fd5c4927f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJH2511351.