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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746521415ce9f7996638cfb0ac5baf437e1ffcbce0ddfe576f9d1bb004fb4e7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9f2222e-4996-4cc9-bdd2-06a7f2ee613a.json and https://artists.proofprofile.net/proofs/artist/e9f2222e-4996-4cc9-bdd2-06a7f2ee613a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8ecd9dcf75f06096f8843790c47029cb0c13ffbde87eda42795e97b63a615. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ921800370.
Main Title (From "Beauty and the Beast")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0be2ca29e837d75ac840a179cd4d75ab7f333bbd265f184070801a9f2b60cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800377.
Playing Love (From "The Legend of 1900")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcda3192b70ee5c3715ddf2c542498979284966b885bfd5d25a7c99aaa0774d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae29609145ca033144663b048be6017fcc73021ff0eda26cec75128dca17d77. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aaa471cf115585a9f493a1667bdb9f932e1095cfd4d5c4155ce5cb14314154. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800375.
Nocturne in C-Sharp Minor, Op. Posth., B. 49
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bf97a99612cacc28e3264a8ccc4749f8f756404ee2e224a302e9b2ab7725aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800376.
Cavalleria rusticana: Preludio - Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41054d8e364e5748747cda921719af40b32dd6e84f62558f5bc5df979580b60. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513b617c88946f28e2c3c44f616d01de20e28eb8ed55e89c43e414916b60c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800383.
Around the World (From "Around the World in 80 Days")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ad73f36042dfed3e7a1564f1aa4c65305da0c3a611920ef4486a1b04d496a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99423582adf875aa2ec0a01fbe111e2b254e70ae4a67b7a71cabcbf69d04e844. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/JPZ921800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29285c4a1da2e4747cfaecde743268a1e39e82f46e6f7bca384444b8f4b200a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96875c1298be05aba106199efd5f65c04875d3c0c24a668fda7869f7420c5583. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800380.
Harpsichord Concerto in F Minor, BWV 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b01f8f0bb2d67e880796f3e41a65b5de77098df13a573ac41a37f7a25dc9b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800381.
The Gadfly Suite, Op. 97a: VIII. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a714fa74bf33233a55e7ed0da5e797f7ddbc0a31a52d0e587a8a36f05b53af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPZ921800373.