Sam Carter may refer to: Sam Carter (athlete) (born 1991), Australian Paralympic athlete Sam Carter (musician), English folk musician Sam Carter (rugby union) (born 1989), Australian rugby union p
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 0x8c94eedc02b8f4c7ab18c5070346bc1c4b00aa020ebfdd5dd9674fd07d80644b. 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/6d34e078-d641-453c-a0ee-a7ff15cf0c76.json and https://artists.proofprofile.net/proofs/artist/6d34e078-d641-453c-a0ee-a7ff15cf0c76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).