José Vicente Ferrer de Otero y Cintrón"Jose Ferrer (American actor)" Encyclopædia Britannica. Retrieved on 2012-05-12. (January 8, 1912 – January 26, 1992) was a Puerto Rican actor and director of sta
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 0x6dbaf4eb005dfc25ff951e98c859297ff6b9b5d0f922f241a31dbc892f83888c. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e51735-e06f-4d81-80d7-34b0039aa90d.json and https://artists.proofprofile.net/proofs/artist/17e51735-e06f-4d81-80d7-34b0039aa90d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nocturne Op. 11 : No. 1 (Arr. for Guitar by Gerard Cousins)
Nocturne Op. 11 : No. 1 - Arr. for Guitar by Gerard Cousins
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 0x0244b8f0f24c945d7aed0429ea127fb0a190192155dccbe21b93b683a34358eb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA62493640.
Pensées Du Soir, Nocturne for Guitar, Op. 44 (Arr. for Guitar by Gerard Cousins)