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 0x9be4cd2b412a26d2e401c844859159e4448ad93b4eac44695dcaf611310e65b9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a76e62b-d0b6-470d-a3b7-3967e0968d8c.json and https://artists.proofprofile.net/proofs/artist/5a76e62b-d0b6-470d-a3b7-3967e0968d8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ymno Eis Tîn Eleutherian (National Anthem of Greece)
Het Wilhelmus (National Anthem of The Netherlands)
Deutschlandlied (Die Deutsche Nationalhymne)
Il Canto Degli Italiani (National Anthem of Italy)
The Star Spangled Banner (National Anthem of The United States Of America)
A Portuguésa (National Anthem of Portugal)
La Marcha Real (National Anthem of Spain)
Himno Nacional Argentino (National Anthem of Argentina)
Himno Nacional De Uruguay (National Anthem uruguay)
Aegukga - The Patriotic Song (National Anthem of South Korea)
La Marseillaise (National Anthem Of France)
Paraguayos, Republica O Muerte (National Anthem of Paraguay)
Kim Ga Yo - May Your Reign Last Forever (National Anthem of Japan)
Der er et yndigt land (National Anthem Of Denmark)
Arise O Compatriots, Nigeria’s Call Obey (National Anthem Of Nigeria)
God Bless Our Homeland Ghana (National Anthem Of Ghana)
O Cameroon, Berçeau de Nos Ancêtres (National Anthem Cameroon)
L’ Abidjanaise (National Anthem Of Ivory Coast - Hymne national de Côte-d'Ivoire)
Himno Nacional De Honduras (National Anthem Of Honduras)
Mazurek Dabrowskiego (National Anthem Of Poland)
Himni i Flamurit (National Anthem Of Albania)
Mila Rodino (National Anthem Of Bulgaria)
Indonesia Raya (National Anthem Of Indonesia)
Gosudarstvenny Gimn Rossiyskoy Federatsii (National Anthem Of Russia)
Amhrán na bhFiann (National Anthem Of Ireland)
Land der Berge, Land am Strome (National Anthem Of Austria)
Du gamla, Du fria (National Anthem Of Sweden)
Jana Gana Mana (National Anthem Of India)
Jana Gana Mana - Thou Art the Ruler of the Minds of All People (National Anthem Of India)
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 0x74c01717976d826b4795cd8e9ab4923885ba08fd55e4f5189747c939139ebb04. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DER751003101.
Hatikvah - The Hope (National Anthem Of Israel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f62616cf878386058d6cc1bce4f4d3043697668b486d995efcfc2fd6acd746. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/DER751003701.
Desteapta-te, romane! (National Anthem Of Romania)
Ja, vi elsker dette landet (National Anthem Of Norway)
La Brabançonne (National Anthem Of Belgium)
Lupang Hinirang (National Anthem Of The Philippines)
Kde Domov Muj (National Anthem Of The Czech Republic)
Istiklal Marsi (National Anthem Of Turkey)
Phleng Chat (National Anthem Of Thailand)