KOLD or Kold may refer to: KOLD-FM, a radio station (91.9 FM) licensed to serve Cold Bay, Alaska, United States; see List of radio stations in Alaska KOLD-TV, a television station (PSIP channel 13/
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01646a02d901850d3842a67bdda08f67e4b7f966cc905f393cc3354735b866c6. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d5469d-da62-4243-804b-fa4600a0437c.json and https://artists.proofprofile.net/proofs/artist/e4d5469d-da62-4243-804b-fa4600a0437c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).