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 0x906c5399fba3dfce49238ac067e5950d552f9931c87a550b783a9dd7ca04de88. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88c5df98-be05-4ee9-afcf-bd0a83d1e0ce.json and https://artists.proofprofile.net/proofs/artist/88c5df98-be05-4ee9-afcf-bd0a83d1e0ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Banda de Cornetas y Tambores Ntra. Sra. del Rosario Cadiz
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 0xed6d020d4ed718a6651338a06ae286dea90fbe55003ee8c921e7112e69c8b655. 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/ES5351604470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47da3a13fc3e0ec6866b9d47b274491af0f89c512ec934be0e1789d2c71b576. 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/ES5351604471.
Banda de Cornetas y Tambores Nuestro Padre Jesús Nazareno (Huelva)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c41dd86e9e8a8108a6627c4713a57e1eed0f75bc6a6a3cb8fde28d6c52236. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5351604472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4e6f4f2705973b9734e9a18227969def665a0e2328df399931fec2ac89a1ec. 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/ES5351604473.
Banda de Cornetas y Tambores Coronación de Espinas de Córdoba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ffa87be291dfac575cc3604dce9c3e8394a99c7093a6fc1e58bb61f247abf4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5351604474.
Cornetas y Tambores de la Esperanza de Málaga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2546151ea1b8b61861b3a74190f680dfb8d288433c7eca015f75b6c85764edb9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5351604476.
Agrupación Musical Ntro. Padre Jesús de la Pasión (Linares)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6797100662394a8af50cc35dd1deaea454d72e7891e31ed23862817425b1e1. 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/ES5351604477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332926d2f88affa6cce571206cbeee38d52b49467ee3f40c9d6035bc8f717c3d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES5351604478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03b4258e1afd9acaf597d7943c351abbf6ce9e6c78e13527cd71bce99d151f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5351604480.