KSL may refer to: Companies and organizations KSL (AM), a radio station in Salt Lake City, Utah KSL-FM, a radio station in Midvale, Utah KSL-TV, a television station in Salt Lake City, Utah Key S
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 0x3a5466e0977dcce4a92d71ca0ca65c2bae803ba9f3653b9ae77c171f928a78c7. 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/5910b6c5-5043-4d4e-b88f-d9a79f67d1c9.json and https://artists.proofprofile.net/proofs/artist/5910b6c5-5043-4d4e-b88f-d9a79f67d1c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).