thumb|Pedro Humberto Allende Pedro Humberto Allende Sarón (July 29, 1885 – August 17, 1959) was one of the most important Chilean composers of the twentieth century. He obtained the prestigious Premio
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 0x82a66efb72ecd4cbc5ca5211d46e48352aa86e0b6ab85b5643617ec5df42f5d6. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f813de4d-4622-426b-8d05-50141394084a.json and https://artists.proofprofile.net/proofs/artist/f813de4d-4622-426b-8d05-50141394084a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pedro Humberto Allende: Concierto para Chelo y Orquesta
Concierto para Chelo y Orquesta. I. Allegro Ma Non Tanto
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 0xc207170b06ad663f8d70cef5696f2af30458aa07efd3a171a2041afaaec68d71. 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/USX9P2363596.
Doce Tonadas de Carácter Popular Chileno: Tonada N°5
Bicentenario de la Guitarra Chilena Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dbb01b64781d858af57138da4795a7e52dedfd8d757a79e7069c778b7cec89. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6N21842931.
Doce Tonadas de Carácter Popular Chileno: Tonada N°4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf5adf9fe0c7846b1b936b36808a4faf9236df719b9616dba910c7ea41a2644. 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/QM6N21842930.
Doce Tonadas de Carácter Popular Chileno: Tonada N°6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d2a2d2b94cdc132d3eac679f31ea7e6c9182b6a7bd71a54dcdb3badd6bd9f3. 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/QM6N21842932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c639dc45ea3adeaba779b4def9ab730d98d78b24bd6e137955efb7378d4f0dc. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NOFKF0602070.