thumb| Ida Emerson (17 April 1873 – 25 September 1945) was a Broadway composer and lyricist. She was one of the few women admitted to the famed group of songwriters of Tin Pan Alley, where she worked
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 0x9d8d6d3073a3d59f37ecce5aaabeeb952cb1734e923649027f1803285b09f1b3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef7b1ae1-ed5d-46d2-a5d6-041221822ac7.json and https://artists.proofprofile.net/proofs/artist/ef7b1ae1-ed5d-46d2-a5d6-041221822ac7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).