W. may refer to: SoHo (Australian TV channel) (previously W.), an Australian pay television channel W. (film), a 2008 American biographical drama film based on the life of George W. Bush "W.", the
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 0xc672b2d03783a8f24518e259de7d7a403129f9a07a8705faf0499cc37fdf3148. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/add589dc-cb0b-4f0f-9c44-aee09c29c9da.json and https://artists.proofprofile.net/proofs/artist/add589dc-cb0b-4f0f-9c44-aee09c29c9da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).