Martin Day may refer to: Martin Day (writer), British screenwriter and novelist Martin Day (fighter), Japanese-born American mixed martial artist Martin Day (architect), Irish architect and builde
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 0xdfd1aa0ac9b6d8193b8d215d331aaeaccebb5787e2ec99c9c726ac6f1d383f5b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a0257f1-4e0e-4300-86ff-4040bc63a0c1.json and https://artists.proofprofile.net/proofs/artist/5a0257f1-4e0e-4300-86ff-4040bc63a0c1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sharp to the Flat (Original Cast Recording)