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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86052c4aec8ad72ca7b3b8020d18cf8ab783c2652d33fae6477ad46aad7b57a3. 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/75d26083-b9f5-4d49-a9c7-04530fe236b2.json and https://artists.proofprofile.net/proofs/artist/75d26083-b9f5-4d49-a9c7-04530fe236b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Being a Reprint from the Reminiscences of John H. Watson, M.D. [A Study in Scarlet, Book 1 (Unabridged)]
The Country of the Saints [A Study in Scarlet, Book 2 (Unabridged)]
Being a Reprint from the Reminiscences of John H. Watson, M.D. - A Sherlock Holmes Novel [A Study in Scarlet, Book 1 (Unabridged)]
The Country of the Saints - A Sherlock Holmes Novel [A Study in Scarlet, Book 2 (Unabridged)]
The Tragedy of Birlstone - A Sherlock Holmes Novel [The Valley of Fear, Book 1 (Unabridged)]
The Scowrers - A Sherlock Holmes Novel [The Valley of Fear, Book 2 (Unabridged)]
A Study in Scarlet [A Sherlock Holmes Novel (Unabridged)]
The Sign of the Four [A Sherlock Holmes Novel (Unabridged)]
The Hound of the Baskervilles [A Sherlock Holmes Novel (Unabridged)]
The Valley of Fear [A Sherlock Holmes Novel (Unabridged)]
A Study in Scarlet (A Sherlock Holmes Novel)
The Sign of the Four (A Sherlock Holmes Novel)
The Hound of the Baskervilles (A Sherlock Holmes Novel)
The Valley of Fear (A Sherlock Holmes Novel)