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 0x6b5079c0bdd24e0ba0b82475779515681fb6765652c0f5eaefdddd891ea99ec6. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee7bc67e-90b0-4a99-9f28-62cd405cc6b7.json and https://artists.proofprofile.net/proofs/artist/ee7bc67e-90b0-4a99-9f28-62cd405cc6b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
우리 삶이 완벽하지 않아도 (Even though our lives aren’t perfect)
다롱냥이 목욕 대소동 (Darong cat_ Bath Time Chaos)
Little Star Adventure (Extended Version)
Dancing in the Moonlight (Extended version)