Tom or TOM may refer to: Tom (given name), including a list of people and fictional characters with the name Tom (surname) Arts and entertainment Film and television Tom (1973 film), or The Bad B
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 0xddcf936b0908769045396a8b12f4d2e6c33760f0531f765e0e97d450a394c381. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86df90f9-7b5b-4261-b9a0-587e50fe3df9.json and https://artists.proofprofile.net/proofs/artist/86df90f9-7b5b-4261-b9a0-587e50fe3df9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).