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 0xa5acb4911e25cd0d2e6de3ac0034f9616179b2da99c40f1d6cdbcaa73c43f298. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a3891d6-5825-4d8f-acf9-61aa84941a82.json and https://artists.proofprofile.net/proofs/artist/1a3891d6-5825-4d8f-acf9-61aa84941a82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Key Collection: 3 Centuries of Rare Keyboard Gems
Studio per il pianoforte, Book 1, Op. 30: No. 26 in G-Sharp Minor
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 0x35f9e0c34e022aeaa33e30772c4ca402ecf5543b79c099b0230f2f4c370bb4bd. 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/HKI191201226.
Carreño: Rêverie & Selected Music for Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeed6794c4457965d9b602c4d397131b4cf36769813583206b8c1ac34e15a550. 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/HKI191328405.
Elégie No. 6, Op. 22, "Plaintes au borde d'une tombe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c92ac0271819b6b161b78dec78aefb55111e5470c02bf39adeb2cd5e1e14c. 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/HKI191328408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9479d0cb69e65fad45a2d2d806e84f5f1e8ec6d766137f0d6414e516934d54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191328410.
Nocturne, Op. 10, "Souvenirs de mon pays"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eeb9d3f1c4bb33044666ac5f864de8483465b2d1a0dfd464cc250fc56f34c5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:05Z), 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/HKI191328401.
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 0xc902c8e4e1321cfc92f7ee2f0ce0fb622c7d3d28cc261ea37e9da2e13c13e89e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/HKI191328402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d691fa11ee07404b3b8c7840af5a10b149146cf9a70b8e88d990954033010e0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKI191328403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c5b2e9bac0137c89197bfbce24fe0bcafbf00dc8018569edc5f03fd4df052. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/HKI191328404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2051bcada3647de5079b94d01b5e464811fb1a4f1d9e619c16bb934d56cbe58. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/HKI191328406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754034044ea1303ee27c4f447dadcb7be8cce24454eaa08ffb21fe4fb73f80d9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKI191328407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a9356732fdc15d874263837a209e6e9e9c59ea258211de50bd548a890010e7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/HKI191328409.