"Double S" is a song written by Bill Anderson and Buddy Killen. It was first recorded by its co-writer and American country singer-songwriter Bill Anderson. It was released as a single in 1978 via MCA
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 0xe03d7f55fff289296ea63cf75e88ca9746f7e61b3144e74633eb830c1605c358. 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/05246ae5-ce21-4aa1-af49-33da6d5f261d.json and https://artists.proofprofile.net/proofs/artist/05246ae5-ce21-4aa1-af49-33da6d5f261d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).