Karol may refer to: Places Karol, Gujarat, a village on Saurashtra peninsula in Gujarat, west India Karol State, a former Rajput petty princely state with seat in the above town Karol Bagh, neighbo
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 0xddb1a8d6c5e9fa124621065af467bf733260290fb33be9917f25011b7bf72ccd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61920382-91f7-408c-a5d0-48d6b3f6901e.json and https://artists.proofprofile.net/proofs/artist/61920382-91f7-408c-a5d0-48d6b3f6901e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).