Tor, TOR or ToR may refer to: Places Toronto, Canada Toronto Raptors Tor, Pallars, a village in Spain Tor, former name of Sloviansk, Ukraine, a city Mount Tor, Tasmania, Australia, an extinct vo
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 0x144ef6e44fb97fa5d97f2f77ab33193351edbd6c5d207cb8d41a3c976297d2ed. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dd00e41-3db0-461f-ae2f-4b0bf4a87f73.json and https://artists.proofprofile.net/proofs/artist/2dd00e41-3db0-461f-ae2f-4b0bf4a87f73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).