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 0x90c35231b38602d45b4806a02a755db0f251b055fefa14e8d876e6cfc7145a97. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1647e915-d482-45d5-af40-ea1ed0491865.json and https://artists.proofprofile.net/proofs/artist/1647e915-d482-45d5-af40-ea1ed0491865.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi: Il ritorno d'Ulisse in patria
Alceste, LWV 50, Prologue: L'Art d'accord avec la Nature (La Nymphe des Tuileries)
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 0x2726fa05ebaf2ad8c12df674e21ebdf0a5f5ae4fc4a2c3a87a2534e0a5aa633b. 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/FROV61716444.
Alceste, LWV 50, Act I, Scene 7: Air pour les matelots
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb4f01c5ddec2f3b4cb06cf238b2da1cab9d039733bc72cf1e7d63b5855471. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FROV61716408.
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 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
Alceste, LWV 50, Act III, Scene 4: Alceste est morte (Ephise, Admète, Phérès, Cléante, le chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6a0b216190177e20783773e19b389753b0e75aa2aae22acf6114f899f8f3f8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FROV61716423.
Alceste, LWV 50, Act IV, Scene 3: Reçois le juste prix de ton amour fidèle (Pluton, Proserpine, l'Ombre d'Alceste, suivants de Pluton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f2166d0a8efd0ea1e0f8f2c2b2cbde136c9969aa0b30a0ee4db9b03b8691e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FROV61716430.