1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xb265289828d1e7269db67a9622ee785a451194220b3079532ab5e9b49ab8602e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e389664e-7c06-44da-944e-1288e63da767.json and https://artists.proofprofile.net/proofs/artist/e389664e-7c06-44da-944e-1288e63da767.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 → block OTSBitcoinBlock must exist at that height 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 0x6b09ce0efd8d6f88105b98069ee5be6be34d9ff7409a0330695759d24c6f8965. 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/CH4210800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bcfe963f66098fd80add79ef5d964827fb4bd15f74c58353c68c432050d43e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH4210800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4550aa578bbbbc7f755298de159d3cc5f11f9f5640c79ff3ba24d763078c0312. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a16f3fb85530822275836db4560045c15e4a6a641dd84b7a9ddf2edf4191e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4210800037.
Luis de Narvaez : Diferencia II on "O Gloriosa Domina"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e27e06921995b1bd82924a662ca26f85811dc63a894a2b8a341c32a509c3e2. 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/CH4210800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf40df60dc86373798ae994780a60b4f60a3c29f8ea92ccbcfdde70f2c2ab80. 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/CH4210800040.
Venegas de Henestrosa : Himno XX "O Gloriosa Domina"
Villancico: Senhora del Mundo (M. Figueras).
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66dedcb4fa30124896187788d0a8734650b1537e138c8e6c54997bcc046c197. 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/CH4210800026.
O Gloriosa Domina - Diferencia I (Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b9a0d763c0b5f7d512f77731078906e966e87f71f62cbf43d94ceb15c1a83. 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/CH4210800029.
Ave María (pentatónica) - Anónimo (China)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba79c0185f6b57ebcec43ef142b1df8ceb37178aaf8afd992c4da21c0d77c8. 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/CH4210800049.
I. Nacimiento e infancia de Francisco Javier: Anónimo. Alba & Rotundellus