1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c6bbcd23b9e8993b2057a7e817764e29293e231084d5160ffc4eeffd196924. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae5aa403-bd43-4b71-b839-d0c3ab2c75da.json and https://artists.proofprofile.net/proofs/artist/ae5aa403-bd43-4b71-b839-d0c3ab2c75da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Excerpt of Beethoven's Sonata No. 8 Op. 13
Excerpt of Schumann's "Romance" Op. 28 no. 2
Pavane pour une Infante Défunte (Excerpt)
II. Adagio Assai (Excerpt from Ravel's Piano Concerto in G Major)