thumb|alt=Frank La Rocca|Frank La Rocca. Frank La Rocca (born in 1951 in New Jersey) is an American classical music composer. Early life and education Frank La Rocca was born in 1951 in New Jersey. H
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 0x13a555cc6318dc977fcc66bf9c1f5907b253ae02b4516e478cde9808fb9e9ae4. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1887e473-f840-43d2-a64d-9e57d849a7b9.json and https://artists.proofprofile.net/proofs/artist/1887e473-f840-43d2-a64d-9e57d849a7b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass of the Americas: I. El cantico del alba
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 0x6328f0d5601062e83cb4dd759664db303ba1ad0441897bf23944b42cceaeef59. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USB8U2201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eedcfd7432510539dcdf5ac9c7c46758594f47dbaa2183a53603351dbd8b61. 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/USB8U2201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55986364ed066671158b4e588735dd5d41868f26e9860e6b49cc88708404f1f3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USB8U2201704.
Mass of the Americas: IV. Offertory "Ave Maria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e552c088c6302d005b6a1ff14f75f5062ccdf9c55d5a127deadab98f49af86. 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/USB8U2201705.
Mass of the Americas: V. Sanctus - Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68783fb85931c3ae9fb02c56e1713f2bbf3200b92528253ba998556537a7a4a7. 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/USB8U2201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f9ca2c45fdb9e12c3d6520252ccd41046f04efd9195697a040ec99cd02ba01. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USB8U2201710.
Mass of the Americas: X. Alma redemptoris mater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22ae0a3f05f21fd07b5df197f2a40f317cfb1542e7941a500f0aa97c4d6860b. 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/USB8U2201711.
Frank La Rocca: Requiem for the Forgotten & Messe des Malades
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfccff72655679e41301268678c6b70349606490cb5e8396bebe5407ce2bf4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U2301958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8e3ef759e5aac3d4ad0f20a566d43a943087b7c437c731c87788ecef6bc0bd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USB8U2301965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7a209381ef230897ed06e5fc1c8fc5382168b2937360343ddf4721f70a43f3. 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/USB8U2301966.
Requiem for the Forgotten: III. Commemoration "A Hymn for Ukraine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7ea789ceef0aa3fa894a79be81f71d4f874ccd5164ec89a78abe5424d82ed5. 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/USB8U2301967.
Requiem for the Forgotten: IV. Offertory "I Will Lift Up Mine Eyes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0572715f4a36c2908d788ba87a1d5cb7e99b6a3d6464ac729feb87ef434dc2b7. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USB8U2301968.
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
Requiem for the Forgotten: V. Sanctus - VI. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a45aabc9d2785d55ca284a80c23d4234bfe7a33d80d1170989fb69888204f7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USB8U2301969.
Requiem for the Forgotten: VII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0167ae18e5c0c5ff5ac5f8733fd838bcf755894210310315416743f7b2444f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USB8U2301970.