thumb|Child having a tantrum thumb|"Christina Rossetti in a Tantrum" by her brother, Dante Gabriel Rossetti A tantrum, conniption, angry outburst, temper tantrum, lash out, meltdown, fit of anger, or
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 0xecb90b6df1c11c2af04514b8586b7faa93d9c5f9de6d2dc87b8e0528a23582b6. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3d3a262-d27c-4f9c-b866-2f8be19a98d9.json and https://artists.proofprofile.net/proofs/artist/f3d3a262-d27c-4f9c-b866-2f8be19a98d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christmas EP 2024 (Now That's What I Call a Tantrum Christmas '24)