Thomas Day may refer to: Sports Tom Day (rugby union) (1907–1980), Welsh rugby union player Tom Day (American football) (1935–2000), American football player Tom Day (footballer) (born 1997), Engl
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 0xfe483dd96e42aa777b7b0d9f2b556f9322dd688e49cf939ed89a463f90c599f5. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ff74e5-a419-4320-9bca-a87098f4f745.json and https://artists.proofprofile.net/proofs/artist/a4ff74e5-a419-4320-9bca-a87098f4f745.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).