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 0x2684d95051552b98318b4171b35e99b367ae31f0d4cb1b7776502b4d7b781493. 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/ba934d9a-4bd3-4596-9fb2-1c75fcfed3c3.json and https://artists.proofprofile.net/proofs/artist/ba934d9a-4bd3-4596-9fb2-1c75fcfed3c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
National Anthem of the Republics, Vol. 1
Brazil National Anthem "Hino Nacional Brasileiro"
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 0xad1c3e6094c24501d0a4a31154b77d22f1a2d824a07b1fee072502bd3d803c18. 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/TCABT1438133.
Croatia National Anthem "Lijepa Nasa Domovino"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce6f8f26a5432c5756ce76d263879978c99bcfc118b1f2f4c31870ae7f3a239. 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/TCABT1438135.
Mexico National Anthem "Himno Nacional Mexicano"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236db00e0c65ab3728d9f81aaaba5d5c3af6c4384216861ed251af4744fb7d26. 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/TCABT1438136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0549f432e047b2ab25b6ab78abadb32734668dc3fd85da278f95194044a81f89. 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/TCABT1438138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c11dc43c15057b1e007ef86bbeb56461278dba7c0ac381e358949c803b2ce1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1438141.
Netherlands National Anthem "Het Wilhelmus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4df0ea71cac5f81733f6f6547431ce7c4e520b379a22fd8ef5d836b479fe445. 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/TCABT1438142.
Chile National Anthem "Himno Nacional De Chile"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ef3ef77033683366cac79861acb4d81ee71c96e012632528e395eb106509c4. 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/TCABT1438148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40512ef4a38ab62b69e9d974094f127e0dc46e66d8eb5217443c0c1d5c3f6ca5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1438149.
Colombia National Anthem "O Gloria Inarmecisible"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d46d5e5ef6ecb7fb97ca219ed390d6d3c8703a0bdaee4bf872fce9b50a97b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCABT1438151.
Greece National Anthem "Inno Nazionale Grecia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847f903db80be87dd245e908db4f8c59b59462d624c11405ab29ff53ed7a5eb2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCABT1438152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd895df3a7257b979445745fd5d5bbe1891e69e27b7b187abaa3eaf15b558f56a. 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/TCABT1438154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a2b319a710dc614ae9797cbf7421765aaea9c4e5e5c565b15e16866d54a45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCABT1438157.
British National Anthem "God Save the Queen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d611159d38a82708e6646f45f7fb7b327f72e246903ace899d5b2eb10c81a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABT1438163.
Italy National Anthem "Il Canto Degli Italiani"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6c93fa6336ece8aea23b57356d28145e57e1598ed14b4e3d8095fd59eba80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCABT1438166.
France National Anthem "Le Marseillaise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006fe3dd3935f298d76d91c2594ace164d948b5aaec17e7cafa152a305e1817. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1438172.
Bosnia-Herzegovina National Anthem "Narodna Himnus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098fa878ac0cb71d81929780f3e5cc3117622da842d0a98cfe821c7b56c087c4. 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/TCABT1438182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d61253b81a5c32643ff6a5f0124516bc563e2fc5dc4a88a476b9ecd44eb52f. 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/TCABT1438186.
Nigeria National Anthem "Arise Oh Compatriots"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf190b1b8afef2bdc9a7fa743adc697085ddfa2b3c4b8018a7033ea04ab70339b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TCABT1438193.
Germany National Anthem "Das Deutschlandlied"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ac7629c0bd72e4de06fc0e537aee82aa2131cb0e8f11cbab7aa04608a44eaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCABT1438195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab9f11084d3dc56a1d5f90211fd944d6ce020b85cb476357c0c86684882084. 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/TCABT1438196.
United States of America National Anthem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d009b1bf29c7c0a0acf449a97caba21587fef9f171373c71ba98918bcb424. 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/TCABT1438203.
Belgium National Anthem "La Brabonconne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42aa392b8bf621dc2e974773ef2343443c556994112a0c29328b54a7e7af034. 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/TCABT1438207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b807ad3759d57402934cd3a12a92a49df23360dff953bde989e2d08ca0c47. 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/TCABT1438208.
Russia National Anthem "Gimn Rossijsko Federacii"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa681d23014f34175781142d6028385de64d20b978d854a8feb0217c61657ff3c. 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/TCABT1438212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108685d19b6bddd10e6aa7807e7d4eed9b415d14f39a74bd2b45e8520c1ace6. 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/TCABT1438215.
Uruguay National Anthem "La Patria O La Tumba"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb453499293d8e570567e475803be7f764c1361a03615ddd0ceaa7f388930ab0d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:46:46Z), 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/TCABT1438158.
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
Argentina National Anthem "Cancion Patriotica"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59659387c8a81139e2b36a4d978cc9103197ac99ec69bf7e0cda1c6ec77ec529. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:16:51Z), 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/TCABT1438177.
Costa Rica National Anthem "Himno Nacional De Costa Rica"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0694f482aa8f13bb367b921475b687b837337dd6d8513693d88ef1a1877d1982. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCABT1438162.
Switzerland National Anthem "Schweizerpsalm"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c688762bd84dc74a9f34bf1b0af6887b13f82d917abda41a4ec7f7aee6f162. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCABT1438169.
Ecuador National Anthem "Salve O Patria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72a1105215c8662f2c3e285262266b783287a49373ffc68479b5f3192aa9dc4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCABT1438171.
Honduras National Anthem "Himno Nacional De Honduras"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3056d4d8374c944f4f2fafe9c0a5035e257323205ab15da3525ac59c8750a288. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCABT1438176.
Ghana National Anthem "God Bless Our Homeland Ghana"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604268b8f3cf8d6418b7c3c98a5b27fff90d1efa79d869d71a526751b5499b6e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCABT1438201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e01df63a3ffd7bf2ea585386977037e6c617984b3b48191f7aa470cbdfa7ee. 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/UKEX32204503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8d4a5f19c6fe6a76d722f95fc15f9c9041abf728c745d5bd194f643d4588f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKEX32204508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd451bb14e51148bc03295aa439682b90b0c24e87f637db6475ba584085eb30. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5FN2228322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f66a232845b38564c41321b71af281fa09617731a7f883d8a537ffdcb35a85d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5FN2228324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe833d1858b8136ba81986bf3d0b8a1f5f63bb2829aed873cbc7557d9f1e7fc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ5FN2228321.