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 0x45bd5670d85c8a53facc6b59152b6d72d377e84e27be3fe989e58eb9173bc2a3. 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/085fa214-a4cd-41bc-846e-9214f7f14404.json and https://artists.proofprofile.net/proofs/artist/085fa214-a4cd-41bc-846e-9214f7f14404.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Alemania - Das Lied der Deutschen - Deutschlandlied - Himno Nacional Alemán ( La Canción de los Alemanes )
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 0x54f815fd18e3957abc1e814c69e270fe2d181abe0ca316824d918f5d795474fc. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720881 — a six-check JSON result.
Argentina - Himno Nacional Argentino - Oíd, Mortales!
Arabia Saudita - Aash Al Maleek - Himno Nacional Saudí ( Larga Vida al Rey )
Venezuela - Gloria al Bravo Pueblo - Himno Nacional Venezolano
Uruguay - Himno Nacional - Orientales, la Patria o la Tumba - Himno Nacional Uruguayo
Ucrania - Šče Ne Vmerla Ukraïny - Himno Nacional Ucraniano ( Aún Ucrania No Ha Muerto )
Túnez - Humat Al-Hima - Himno Nacional Tunecino ( Defensores de la Madre Patria )
Turquía - İstiklâl Marşı - Himno Nacional Turco ( Marcha de la Independencia )
Tailandia - Phleng Chat - Himno Nacional Tailandés
Suiza - Schweizer Psalm - Himno Nacional Suizo ( Salmo Suizo )
Suecia - Du Gamla, du Fria - Himno Nacional Sueco ( Tú Antigua, Tú Libre )
Sudáfrica - Die Stem van Suid-Afrika - Nkosi Sikelel' iAfrika - Himno Nacional Sudafricano ( La Llamada de Sudáfrica - Dios Bendiga a África )
Senegal - Le lion rouge - Princes tous vos koras, frappez les balafons - Himno Nacional Senegalés ( El León Rojo - Pincez Tous Vos Koras, Frappez les Balafons )
Rumanía - Deşteaptă-te, Române! - Himno Nacional Rumano ( ¡Despierta, Rumano! )
República Checa - Kde Domov Můj? - Himno Nacional Checo ( ¿Dónde Está Mi Hogar? )
Reino Unido de Gran Bretaña e Irlanda del Norte - God Save the Queen - God Save the King - Himno Nacional Inglés ( Dios Salve a la Reina - Dios Salve al Rey )
Portugal - A Portuguesa - Himno Nacional Portugués ( La Portuguesa )
Polonia - Mazurek Dąbrowskiego - Pieśń Legionów Polskich we Włoszech - Himno Nacional Polaco ( La Mazurca de Dabrowski - La Canción de las Legiones Polacas en Italia )
Países Bajos - Wilhelmus Van Nassouwe - Himno Nacional Holandés ( El Guillermo )
Paraguay - Paraguayos República o Muerte - Himno Nacional Paraguayo
Noruega - Ja, Vi Elsker Dette Landet - Himno Nacional Noruego ( Sí, Amamos Este País )
Nigeria - Arise O Compatriots, Nigeria's Call Obey - Himno Nacional Nigeriano ( Oh Compatriotas, Levantaos y Seguid la Llamada de Nigeria )
México - Himno Nacional Mexicano - Mexicanos, Al Grito De Guerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55a79e34454bacf1ee82bc93e370d64eea5191b8a38d34d7c4f6a839a96787. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720855 — a six-check JSON result.
Libia - Allahu Akbar - Himno Nacional Libio ( Dios es Grande )
Kenya - Ee Mungu Nguvu Yetu - Himno Nacional Keniano ( Oh Dios de Toda la Creación )
Japón - Kimigayo - Himno Nacional Japonés ( Que su Reinado Dure Eternamente )
Jamaica - Jamaica, Lande We Love - Himno Nacional Jamaicano ( Jamaica, la Tierra Que Amamos )
Italia - Inno di Mameli - Fratelli d'Italia - Himno Nacional Italiano ( El canto de los Italianos - Himno de Mameli - Hermanos de Italia )
Israel - Hatikvah - Himno Nacional Israelí ( La Esperanza )
Irlanda - Amhrán Na bhFiann - Himno Nacional Irlandés ( Canción de un Soldado )
Indonesia - Indonesia Raya - Himno Nacional Indonesio ( Gran Indonesia )
India - Jana Gana Mana - Himno Nacional Indio ( El Espíritu de Todo el Pueblo )
Hungría - Himnusz - Isten, Áldd Meg a Magyart - Himno Nacional Ungherese ( Dios, Bendice a los Húngaros )
Grecia - Imnos Is Tin Eleftherian - Himno Nacional Griego ( Himno a la Libertad )
Francia - La Marseillaise - Himno Nacional Francés ( La Marsellesa )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b6880ca925b2621f96fe421030350ce15fcdd73c8bc60a7d752bf24c426dcc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720879 — a six-check JSON result.
Finlandia - Maamme - Himno Nacional Finlandés ( Nuestra Tierra )
Filipinas - Lupang Hinirang - Bayang Magiliw - Himno Nacional Filipino ( Patria Adorada )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44742a838fee3c3b25d39c1becf2242d7cc88f63193a73e0e36f3b595c28017c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720849 — a six-check JSON result.
Federación Rusa - Gimn Rossijskoi Federazii - Himno Nacional Ruso ( Himno de la Federación Rusa )
Estados Unidos de América - The Star-Spangled Banner - Himno Nacional Americano ( La Bandera Tachonada de Estrellas )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed5c992dffcd384fbdc39d63d0181b8265ac6af2f970223fc7ea31a09c0083. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720878 — a six-check JSON result.
España - Marcha Real - Marcha de Granaderos - Himno Nacional Español
Eslovenia - Zdravljica - Himno Nacional Esloveno ( Un Brindis )
Eslovaquia - Nad Tatrou Sa Blýska - Himno Nacional Eslovaco ( Hay un Relámpago Sobre los Tatras )
Escocia - Scotland the Brave - Himno Nacional erscocés ( Valiente Escocia )
Egipto - Bilādī - Himno Nacional Egipcio ( Mi País )
Ecuador - Salve, Oh Patria - Himno Nacional ecuatoriano
Dinamarca - Kong Christian Stod Ved Højen Mast - Himno Nacional Real ( El Rey Christian Estaba en el Palo Mayor )
Cuba - La Bayamesa - Himno de Bayamo - Himno Nacional Cubano
Croacia - Lijepa Naša Domovino - Himno Nacional Croata ( Nuestra Hermosa Patria )
Costa Rica - Himno Nacional de Costa Rica - Noble Patria, Tu Hermosa Bandera - Himno Nacional Costarricense
Colombia - Himno Nacional de la Rebublica de Colombia - Himno Nacional Colombiano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79833dc7ed0c4233989fa24f20de24e906c46c3c0fdfa005709b820739d1ec25. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720844 — a six-check JSON result.
Ciudad del Vaticano - Inno e marcia pontificale - Himno Nacional Vaticano ( Himno y Marcha Pontificia )
China - Yiyongjun Jinxingqu - Himno Nacional Chino ( Marcha de los Voluntarios )
Chile - Himno Nacional de Chile - Canción Nacional de Chile - Himno Nacional Chileno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708f0162a6e9fd4ebd90117c0f05b339e63a235fe85fa90fb7909c149129417a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720842 — a six-check JSON result.
Canadá - Ô Canada - Himno Nacional Canadiense ( Oh, Canadá )
Camerún - Chant de Ralliement - Ô Cameroun, berceau de nos ancêtres - Himno Nacional Camerunés ( Canto de Unión )
Bélgica - La Brabançonne - Himno Nacional Belga ( La Brabanzona )
Bulgaria - Mila Rodino - Himno Nacional Búlgaro ( Querida Patria )
Brasil - Hino Nacional Brasileiro - Himno Nacional Brasileño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f0aa25e685c47e6cff6af70124ba36e7670b0422eb14309c0648ac42779fd. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720839 — a six-check JSON result.
Bolivia - Bolivianos, El Hado Propicio - Himno Nacional Boliviano
Austria - Land der Berge, Land am Strome - Himno Nacional Austriaco ( Himno Federal - Tierra de Montañas, Tierra Sobre el Río )
Australia - Advance Australia Fair - Himno Nacional Australiano ( Avanza, Australia Justa )
Armenia - Mer Hayrenik - Himno Nacional Armenio ( Nuestra Patria )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cef27bbefceae14a1479bf92139c2a4237e39b5a0c59cdcfb93f55af534e6a5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720611 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69c32f256a3d6735af7cfa7bc8237acf696a37cdbbf8cb030bec3ac976b7cb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720629 — a six-check JSON result.
Himnos Nacionales, Vol. 2 (Las Américas, África, Asia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ee04307615762fd32d678f54f5622c73c1938201951345149839c455266a2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720649 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde0ebb5277ebff57b0993e9226eab8f7524482e5b87299f63b183840a2401d5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC471720659 — a six-check JSON result.