WC or wc may refer to: Water closet, or flush toilet Arts and entertainment W.C. (film), an Irish feature film WC (band), a Polish punk rock band WC (rapper), a rapper from Los Angeles, Califo
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 0x5f2e9b6b65d7af1db0efa5efa27063d76fdd89c36386e4b5870188c2bb82c1e5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65808b6c-cc2e-41b6-b7c7-b41a995b3ff6.json and https://artists.proofprofile.net/proofs/artist/65808b6c-cc2e-41b6-b7c7-b41a995b3ff6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).