8 to the Bar is a studio album released by Pete Johnson and Albert Ammons in 1941 on Victor 78 rpm set P-69, record numbers 27504 through 27507. Background It was recorded in two sessions, May 7 and
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 0xe1b5cba3001aec08d019a67207922860bcb8a2ff3d0a80d25053a4c2723e903d. 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/67bbec17-1aa3-41bc-81eb-422d7a575c3c.json and https://artists.proofprofile.net/proofs/artist/67bbec17-1aa3-41bc-81eb-422d7a575c3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).