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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc502fab55d398e5ca1798c47c95dde2c29a1a2329c6ea52a918232d06e86f8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b39be4e7-039e-4317-8bd1-c5173eb7b025.json and https://artists.proofprofile.net/proofs/artist/b39be4e7-039e-4317-8bd1-c5173eb7b025.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Decameron Negro: 1. El Arpa de Guerrero
El Decameron Negro: 2. La Huida de Los Amantes por el Valle de Los Ecos
El Decameron Negro: 3. La Balada de la Doncella Enamorada
Nocturnal, After John Dowland, Op. 70: I. Musingly
Nocturnal, After John Dowland, Op. 70: II. Very Agitated
Nocturnal, After John Dowland, Op. 70: III. Restless
Nocturnal, After John Dowland, Op. 70: IV. Uneasy
Nocturnal, After John Dowland, Op. 70: V. March - Like
Nocturnal, After John Dowland, Op. 70: VI. Dreaming
Nocturnal, After John Dowland, Op. 70: VII. Gently Rocking
Nocturnal, After John Dowland, Op. 70: VIII. Passacaglia
Nocturnal, After John Dowland, Op. 70: IX. Slow and Quiet
First Booke of Songs: XX. Come, Heavy Sleep
First Booke of Songs: IV. If My Complaints Could Passions Move
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 → block OTSBitcoinBlock must exist at that height 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 0xb3912a48bebba83c7f05c610cca40fd4460d27c226f8a3ac502d54ed51340bba. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM82427428.