thumb|Dark chocolate hagelslag sprinkles on buttered white bread (, ; , from muisjes) are small, oblong, sweet-tasting chocolate sprinkles or granules, a few millimetres long, which are sprinkled on
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 0x1c27804a2d2d83dfb850f02f704c8a5bebb8bb7693ce066b3bdccb1149e581c4. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdbf9e60-e1d3-4fe8-bdb9-6adfad706800.json and https://artists.proofprofile.net/proofs/artist/cdbf9e60-e1d3-4fe8-bdb9-6adfad706800.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).