Dalton may refer to: Science Dalton (crater), a lunar crater Dalton (program), chemistry software Dalton (unit) (Da), a.k.a. unified atomic mass unit John Dalton, chemist, physicist and meteor
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 0x70979d46d9c766ee8cc286dd6c47df2f4a969c05995506158487e032be20a80e. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c23d49c5-671e-42c4-9b9f-935ee31e85a9.json and https://artists.proofprofile.net/proofs/artist/c23d49c5-671e-42c4-9b9f-935ee31e85a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).