thumb|325x325px|Julián Carrillo in Paris, September 4th, 1899 Julián Carrillo Trujillo (January 28, 1875 – September 9, 1965) was a Mexican composer,Camp, Roderic Ai (1995). "Carrillo (Flores), Nabor"
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 0x6f1213dc98f64d867a0c52d9d28e89392d97b38fe8a1658a07c0f4b35310ffd2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c3d165c-03a4-489a-852d-866ba6311ed7.json and https://artists.proofprofile.net/proofs/artist/4c3d165c-03a4-489a-852d-866ba6311ed7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Primera Sinfonia en Re Mayor: I. Largo Allegro Poco meno mosso
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 0x31fcf7a5e77c0ad0d8444de16d66f2c35c0873c07ca08e23ad10c1d804daffa1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEWSJ6110701.
Primera Sinfonia en Re Mayor: II. Andante Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c1e7d988b0c5afc1a527b3d4892d47452b4a467440f443c28c6b6215fc5b6. 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/SEWSJ6110702.
Primera Sinfonia en Re Mayor: IV. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b791024c69c83fc9ed195793ae7a589edda249a3aec49fb363923321db38816. 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/SEWSJ6110704.
Tema con Variaciones para Orquesta, Op. 2: V. Variation IV Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead3d828595cdd86d1d3795eccdf7d636aa01a8190bbdb9d8d8c49fb695c23dd. 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/SEWSJ6110709.
Primera Suite para Orquesta, Op. 1: III. Valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f8930140f88d56605ffbd9d572ab254a54ca7b12e19c4202370339c054a24. 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/SEWSJ6110715.
Primera Sinfonia en Re Mayor: III. Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcd75d28c338bc6cd9d8aa519070b5fd2a40a01896b4c3b680039f6c39ea71f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SEWSJ6110703.
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
Tema con Variaciones para Orquesta, Op. 2: I. Tema Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d338ae2ea8013b59244b86036681e94a078d07ba0379dba2fd6f826dc2629c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEWSJ6110705.
Tema con Variaciones para Orquesta, Op. 2: III. Variation II Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf147aa7716fe34a1370ce5e96c68ca31058c3a5ea20f20218eaa86304d0450b7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEWSJ6110707.
Tema con Variaciones para Orquesta, Op. 2: VII. Variation VI Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537a801cd245bbd913bc29d82889c34df47430d2d6af255bd3f035254e938c9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/SEWSJ6110711.
Tema con Variaciones para Orquesta, Op. 2: VIII. Tempo di Polonesa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0637ba4eebc78c58e1dee8c37867d75f1b1fce4147d3f6eedf3be3ca4cf4f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEWSJ6110712.
Primera Suite para Orquesta, Op. 1: I. Gavota
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc7bd25939af57cb2c3fa3c5c4a0899fd0d144ef1c1209fd96e8de0140a0856. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEWSJ6110713.
Primera Suite para Orquesta, Op. 1: IV. Final
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266353e99d9e116c278eee64a4d62cd1e0357b06706cc9a2510c246a9f4ddf0a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEWSJ6110716.
Julián Carrillo: Mass for Pope John XXIII
Julián Carrillo: Six Quasi-Sonatas in Quarter Tones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5613a6c5623513e8716987de7e0b949ea558870ea8733047baac512cce85a8. 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/MX2831200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d254b019b77889b0ffc5b676b8e9caebf10885b31734fe85ca7f4dfa93c6f4d. 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/MX2831200862.
Darmstadt Aural Documents, Box 3: Ensembles
Symphony in D Minor, Op. 17: III. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473cf6a348f8cea0f39201383f3989180ca50cac4b82b291274a072c6a9074b. 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/SEWSJ1650517.
La Potosina, San Luis Potosí en el Siglo XIX