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 0xe2546121fab229d9ca13e955bd994a9f9e6f3a9357c2235915e202d1935ae25a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36667c4f-c729-4fae-a096-64394e9c8855.json and https://artists.proofprofile.net/proofs/artist/36667c4f-c729-4fae-a096-64394e9c8855.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Himnos, Marchas y Canciones Militares Españolas
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 0x23429071e77c98dd00a50cc66af834071b54875d7ac844766579349f12148ac6. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:42:21Z), 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/ES5630701997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043e79717ae7a626354f69b720f80e66aa84495d79851c5ca73acf96d9dc2a3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5630702006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3372132339bbaa070c5771abebcc8bfcab467687972d0103e4e6ee4661568aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:23Z), 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/ES5630702007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d1623b763ab1108be02c454a178b9b34e44fcbc94725cf2b5bd98656a52a01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES5630702008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f70a1d19a48bac55023dcaf6f37091feae147c8faa0f69af35d6f4658bc8b85. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES5630702009.
Himno Nacional De España Seleccion Nacional De Futbol
Himno Nacional De España Selección Española de Baloncesto
Caballero Legionario. Himnos, Marchas Y Canciones Militares De La Legión
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0bf3ce759e6cab051c06fa8eacfe10e92f3023f34525099038984da6dd105b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:51Z), 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/ES5631101355.
La Legion. El Novio De La Muerte. Marchas, Himnos Y Canciones Militares De España
Madrid 12 de Octubre. Desfile Fiesta Nacional
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe336a748ea11cf091a345dc5445932feb59f15d350bdba50813e217f1f7bf602. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USA371459825.
Día de las Fuerzas Armadas. Marchas del Ejército
España. 25 Canciones, Himnos y Marchas Militares
Especial Desfile. 25 Canciones e Himnos Militares
Spanish Army Band. Hymns and Songs from Spain
Hymnes et des Cantiques de l´Espagne. Espagnol Army Band
Música para Regalar. España, Himnos y Marchas Militares
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecc66dfe1fbc3e6a63ad31bc6239bf134ef2f35d309e3866234a9259eb99876. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5631104589.
Music As a Gift. Spain Hymns and Military Marches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0070eec70503035b9d4b745a00a0444267bb7858308a7186a2c448e9767a0192. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:17Z), 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/ES5631203614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358519aea982fa5106cd6be99ec2bfe2c2aff55949e1262f52d48fb0b469e37f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5631203629.
Hymnes und Lieder von Spanien. Spanische armee Band
Desfile Fuerzas Armadas. Día de la Fiesta Nacional. Himnos, Marchas Canciones Militares
Military Music. Military Marches and Army Song from Spain
Desfile de las Fuerzas Armadas. Día de la Fiesta Nacional. Himnos y Marchas Militares
Desfile Real de la Coronación. Felipe VI, Música del Ejército y Marchas Militares para un Nuevo Rey