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 0x4b948f244b288c2396bd2b0c074e1d55e55a33ff9e60398dbe310cbd780a6930. 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/e0cc7106-39f4-488a-8dfa-4bcd92cc105d.json and https://artists.proofprofile.net/proofs/artist/e0cc7106-39f4-488a-8dfa-4bcd92cc105d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pièces pour harpe de verre (Works for Glass Harp)
Six Variation for Glass Harmonica: VI. Variation No. 5
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 0xb5d97c44e104a10a79954871fadf2779ce5d6433b453db684a5d3f116b552425. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH1409694007.
Adagio for Glass Harmonica in C Major, K. 356 (617a)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1269bd2c2dc1ddc2e5b6ed40e79fc13d96371f8cae00d92c91142595cfdf5918. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH1409694014.
L'Oeillet de Gant, Hoffmann, Reichardt, Naumann, Weiss & Sutermeister: Works for Glass Harp & Lute