December is the 12th and final month of the year in the Julian and Gregorian calendars. Its length is 31 days. right|thumb|December, from the Très Riches Heures du duc de Berry thumb |In recent decad
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 0xda75c2e92f14ef5ffdf844a07dd69d529e13f1af8a18071361e2b090d681f4e6. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b5992bb-24cf-40f4-8387-f87dff897ad7.json and https://artists.proofprofile.net/proofs/artist/3b5992bb-24cf-40f4-8387-f87dff897ad7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where Were You Hiding When the Storm Broke?