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 0x08254ce2e3d6f3547ee2365062abe420f721ce45524e0729d17f5d393f36a6e1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55ba172b-d0e3-4f65-a1b2-7d6522385e57.json and https://artists.proofprofile.net/proofs/artist/55ba172b-d0e3-4f65-a1b2-7d6522385e57.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prelude in B minor, Op. 28, No. 6: Lento assai
Cello Suite No. 1 in G Major, BWV 1007: Prelude
Variation 30 in G Major, BWV 988: Quodlibet
Variation 22 in G Major, BWV 988: Alla Breve
Prelude in A major, Op. 28, No. 7: Andantino
Prelude in D-flat Major, Op. 28, No. 15: Raindrop