DY, D. Y., Dy, or dy may refer to: Science and technology , Leibniz's notation for the differential of a variable y Dysprosium (symbol Dy), a chemical element 1,4-Dioxane, a solvent Astronomy DY
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 0x754e047e47bb98c5cb5358ab5610e7479049b2139025c69e54bacac98efc702e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05694f1e-adfb-408c-96e6-e6f1d8898fb8.json and https://artists.proofprofile.net/proofs/artist/05694f1e-adfb-408c-96e6-e6f1d8898fb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).