Thomas, Tom or Tommy Mason may refer to: Politicians Stevens T. Mason (Stevens Thomson Mason, 1811–1843), also known Tom Mason, founding governor of Michigan, 1835–1840 Thomas Mason (1753–1800), Am
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 0xc01ea42a5865afcb0932c397c875d49369766565b37828f5a235a6087c04bfb7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5212c933-468b-411b-b2f0-99b7d1fbba63.json and https://artists.proofprofile.net/proofs/artist/5212c933-468b-411b-b2f0-99b7d1fbba63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).