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 0xd8070890a926c111b8777b40527553b4ef2664b6bade7c2b613af7b80ab8d402. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14b2fb7e-5fe6-4ae1-b885-84b4ef3022dc.json and https://artists.proofprofile.net/proofs/artist/14b2fb7e-5fe6-4ae1-b885-84b4ef3022dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stavros Tzouanakos / Singers of Greek Popular song in 78 rpm / Recordings 1949 - 1959
To Magemeno Psema (U.S.A. Recordings 1955-1963)
Nostalgia (Authentic Recordings 1947- 52)
Palio Meraki (Authentic Recordings 1952-1959)