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 0x2003b95f94df9d57c3e2d1b295c494764508c8b0384c729c83fb0583e90cdd5e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a27e43d8-e9aa-4dd3-9869-c08c7586c1ee.json and https://artists.proofprofile.net/proofs/artist/a27e43d8-e9aa-4dd3-9869-c08c7586c1ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2 Novelettes, FP 47: No. 2 in B-Flat Minor. Très rapide et rythmé
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 0xa590259b4d7870bb0ebbaa8ced4d8134dacec9a401f62894f03aba089b4310af. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPP591908102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3e9bc18c289e76377b3f22ddcdeea8f7b17a86286d8a7f063aea173561faa. 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/JPP591908103.
15 Improvisations: No. 3 in B Minor, FP 63 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bfe58aae225e1a3a8f51bad7536a154765f2c44d37671cd8d8b98ff44d1c43. 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/JPP591908106.
15 Improvisations: No. 6 in B-Flat Major, FP 63 No. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91a8bc82777c019a53e422f2c10c0c380399ea5e878248e5b9c038931b06613. 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/JPP591908109.
15 Improvisations: No. 9 in D Major, FP 63 No. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9e34385a9130d240fbaa41f7181d709793f7e6897f21f977023b6741ff9cc3. 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/JPP591908112.
15 Improvisations: No. 11 in G Minor, FP 113 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e24434b1fba8681948bbe63d131df39061c679b81389c6073776a1e15b53dac. 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/JPP591908114.
15 Improvisations: No. 13 in A Minor, FP 170 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9e96e90bd27516d5ecd586dc75f79a7a39480053776a8dc2a0b3fb2aac801a. 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/JPP591908116.
15 Improvisations: No. 15 in C Minor, FP 176 "Hommage à Édith Piaf"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4cb608be5355b43509451814996339abc7ad49daf65172f7a10e26ad576b25. 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/JPP591908118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa7ce606b1867af570dbe5e4d7705d1ccc1e2332948256a6fd9ee371c196b2. 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/JPP591908119.
2 Novelettes, FP 47: No. 1 in C Major. Modéré sans lenteur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9b26703bf838612813d4953363bf76e350cac28eb0403508cbb5cb2dcba352. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPP591908101.
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
15 Improvisations: No. 1 in B Minor, FP 63 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1534a724a6333f41b2954eecd0d7748f2f4ace9c616f6dfa4f9dde4517cd3e1. 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/JPP591908104.
15 Improvisations: No. 2 in A-Flat Major, FP 63 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aef6e33b93f64a57b65f452caeaa523c69b7f8819b30a7402ae9aabcbabd80f. 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/JPP591908105.
15 Improvisations: No. 4 in A-Flat Major, FP 63 No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc5f974843639b3ba07c2e13b05b87b888870ff7774627226269a78c99328e7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPP591908107.
15 Improvisations: No. 5 in A Minor, FP 63 No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794dc94938decac722bc92fd51fe975aba90ed82a641450fcb01703c71ec5d1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPP591908108.
15 Improvisations: No. 7 in C Major, FP 63 No. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea98c48a0cd64b5d04dd7cc3704ac66169c630decdda065bbb02f27e28562a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPP591908110.
15 Improvisations: No. 8 in A Minor, FP 63 No. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f69e1c2bf51b479cb7f0e069976b26f61dcc29bfb99805db54e932a6172a2e5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPP591908111.
15 Improvisations: No. 10 in F Major, FP 63 No. 10 "Éloge des gammes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c6410e353df4bf1af0a5ca32dfc2a6d60cd899cefc664ecdf16bff62185da. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPP591908113.
15 Improvisations: No. 12 in E-Flat Major, FP 113 No. 2 "Hommage à Schubert"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb85e8e247ee937a36cd6d514fe81ef71cc1a60bf6b9957ee35a5ef9442f5314. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPP591908115.
15 Improvisations: No. 14 in D-Flat Major, FP 170 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3794228fdf8d0192ead59e2f3174f109afec2bc0ef5e2bc2c10b6583d8d7b6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPP591908117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027972fa4db6f2b3ea9a263ccbf3e6fe8da11b01c02dde31346e3340402ec9ab. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPP591908120.