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 0x1368116aaa0b3f72f181dc2f4bac95b63c687eddf4f17567bf07dcf163eee0a4. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f1feb6d-8448-458d-942b-ae8ccaf945b4.json and https://artists.proofprofile.net/proofs/artist/4f1feb6d-8448-458d-942b-ae8ccaf945b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata Op.13 No. 8 in C Minor Pathetique. 2nd movement (delayed version)
Prelude and Fugue No.2 in C Minor, BWV 847 (modern versions)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bb3ff6e84a964d982abfdce1ecc3a91d890ce6ca600528cb9a08bf94d78f22. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA491908199.
Romantic Piano Music (Christmas version, Arr. for music box)
Six Variations in F Major KV 54 (Christmas version, Arr. for music box)
12 Variations on a Minuet by J.C. Fischer in C Major