TC, T.C., Tc, Tc, tc, tC, or .tc may refer to: Arts and entertainment Film and television Theodore "T.C." Calvin, a character on the TV series Magnum, P.I. and its reboot Tom Caron, American telev
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 0x1e83f608c1851f380c7662ac179de8fe0bd734eed7c7fe6c00b899efa6d9dd32. 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/e740f504-4f2c-420b-810a-53b13a6efa8c.json and https://artists.proofprofile.net/proofs/artist/e740f504-4f2c-420b-810a-53b13a6efa8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).