Happy Harmonies is a series of twenty-six animated cartoons distributed by Metro-Goldwyn-Mayer and produced by Hugh Harman and Rudolf Ising between 1934 and 1938. Produced in Technicolor, these carto
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683746e79d69a65f669f8039551f455c57bd81664d0bbeb2fb2bde930a3be80b. 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/5e7373bf-ccf4-461f-a66c-ab6348440bef.json and https://artists.proofprofile.net/proofs/artist/5e7373bf-ccf4-461f-a66c-ab6348440bef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joyful Canine Melodies: Tunes for Happy Dogs
Festive Tunes: Celebratory Music for Gatherings
Baby’s Soft Sounds: Harmonies for Playtime
Companion Tunes: Harmonious Sounds for Pets
Feline Harmony: Soothing Sounds for Cats
Healing Retreat: Spa Music for Peace and Calm
The Feline Serenade: An Orchestra For Cats