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 0x5ce4badcca2bc8572b14914c87a6979672ce37dca34d0fcbb78dd675cc82a60f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b3f69d7-148f-49b4-9b12-89f390bc1fbf.json and https://artists.proofprofile.net/proofs/artist/3b3f69d7-148f-49b4-9b12-89f390bc1fbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concierto de Aranjuez: II. Adagio - Excerpt
Orquesta Sinfonica de la Radio Television Espanola
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 0x3b70bcd0495dc9f67b50795c06944fbb684d777d9e0ef7ecd3fb33a647402337. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF056903454.
Concertino para guitarra y orquesta en la menor op.72: 1. Allegro
Rodrigo: Concierto de Aranjuez; Concierto madrigal / Bacarisse: Concertino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04b436350bbefdd9dc9a34784aa783d4875a8bac710e48af142c31811509a9a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF057202201.
Concertino para guitarra y orquesta en la menor op.72: 2. Romanza. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee9546d87a67d45083eab675270ed7f6a03dbaa43553f36d47dfa50f222da9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF057202202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05134aa2992d6532f108e39cd1b25e851d227c1b8074d9d68b2c6e3efd6cea50. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5025800040.