Beach Combers is a 1936 animated short subject by Walter Lantz Productions and features Oswald the Lucky Rabbit. It had an original copyright notice and was renewed. Storyline One day at a beach,
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 0x521b8bf9d0a425d722159103ed460f3bf8f25c4dd2738c00e0cd0aea9fd35d3d. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2e7b93d-e936-484f-af0a-70d9821043e6.json and https://artists.proofprofile.net/proofs/artist/e2e7b93d-e936-484f-af0a-70d9821043e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).