Tom tom or TomTom may refer to: Tom-tom, a cylindrical drum with no snare TomTom, a Dutch manufacturer of navigation systems Tom Tom (TV series), a 1960s science-themed children's television series
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 0x78eaf92ecc6da15805a7241e62bf0d17aff9a1c8a88768f81302a42eda01c265. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11c20ff6-c796-4b4f-a6ec-72b34582eaf8.json and https://artists.proofprofile.net/proofs/artist/11c20ff6-c796-4b4f-a6ec-72b34582eaf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).