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 0xec9b78d73f9ec049a8825e3727c904a25156a9f41cdd456c31e7e79d08e2bc1a. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1df20ee8-ea06-4bca-944f-9bffa31b5bcc.json and https://artists.proofprofile.net/proofs/artist/1df20ee8-ea06-4bca-944f-9bffa31b5bcc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concierto Para Flauta En Fa Mayor Op 10/5. Largo
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 0x867d1af77bb54d0c62fee1ab72ea634743d4e4a1724c3e87a78ea25bae514f33. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:10Z), 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/ES8620811102.
Concierto Para Dos Trompetas En Do Mayor. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6a8840cdf7baf1df8dac0d61086820384633828481165fc3a9f9ba74cfbc97. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ES8620811104.
Concierto Para Flauta Y Orquesta En Sol Menor "La Notte" Op 10/2. Presto-Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72013e4f86b0a6ece092de745f8efb31954f4b3682a7b45684d6e22011b1ac77. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:51Z), 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/ES8620811111.
Gloria En Re Mayor Para Solistas, Coro Y Orquesta. Gloria In Excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7c291604023be76e352ae862695af334c5aacdf2156c2d0194a04b96ae631. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:36:34Z), 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/ES8620811115.