Black Patch may refer to: Black Patch Park, Smethwick, England Black Patch Tobacco Wars, price war and violence over tobacco prices in early 1900s US Black Patch (film), a 1957 American Western film
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 0x52a1cb238cafdb3a4694954b7bdad088d9a9c32f7e1d961cd0854213a6ef9d65. 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/1b014fe3-d097-4134-be6d-d1f96ccebe84.json and https://artists.proofprofile.net/proofs/artist/1b014fe3-d097-4134-be6d-d1f96ccebe84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).