Sam Stone may refer to: "Sam Stone" (song), 1971 song by John Prine Sam Stone (character), character in the video game series Serious Sam Sam Stone (rugby league), Australian rugby league player Sam
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 0xef68c7b9d77a71e6eb41586436423fffb35d3ab801745b8ac9f3d08ded6ef7d8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53b83e38-4b1a-4b8c-845d-8ff0a7f11a19.json and https://artists.proofprofile.net/proofs/artist/53b83e38-4b1a-4b8c-845d-8ff0a7f11a19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).