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 0xb7f0eff3bf46bd09703bdb4c928ff3e396c5d8e34b33d61155e75a94634cdc57. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a9f43d8-67a6-426e-948c-ab065efeda01.json and https://artists.proofprofile.net/proofs/artist/7a9f43d8-67a6-426e-948c-ab065efeda01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Adin Ederra (Choeur d'hommes du Pays Basque)
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 0x866dacd6c570d04151c568869156ccbd4e7b52ebd5d73a8cc75958f323142fbe. 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/FRZ510600368.
Voix du Pays Basque (Versions Originales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4746bdecc7abbd0348cf10228f989bfa3986fd908d32e6f164872c137c504c. 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/FRZ510400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ed4974f7171945acfbedb9699e45e1602c7112a9911affc140cc3999d3f33f. 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/FRZ510600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27703cec4405f1867ba57c2b4fa8a00e171b9e03b53efa93e0a3c744ed67952. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FRZ510900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683a77e79e322d3836bc91b5ae99798fa6bd584324555bbab69b8377d39a2b91. 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/FRZ519600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fd5320fcbd290d37c058a00a93911c9f7d722edb71e071e80bacb0619c0421. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FRZ519800292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382c3fee4557189b2d27b217db654a1f4b701ce3c318755b74d17e06b1bff2b. 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/FRZ511300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2c6e88040a37599be6892fa98a2b307356443b295dae01e505cde293d91ba5. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FRZ510400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7ca8ecb6dfe9a06fc733aabd312eeca6a713db93a1cb3f17616925b6bc5a6. 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/FRZ511300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5036a8c6e7d0f10c548b0be2864e2cf98f14861b3f3e3a2ee37ea8a5422f5bd. 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/FRZ519400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6658227e98f3d01c9bf8be520b0cc4f04c9b0e1fcf0580e94613e178e6ec5e5. 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/FRZ511300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33367fd0e360865a08f764d751bd19e31ba189a8f008b519e9d19bece6d5ca84. 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/FRZ518800062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b263dc0a6f11ae8950a750b25fec83b9ee0fcd3b6158576842b809835f4020e. 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/FRZ519800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f3e91e1c0083f4fe5d04949834d65e9c446d34c50db2e3ca9e2076270fb92. 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/FRZ511200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4360df75c4408012c6fb932595759dcd4b6294bf649315396aefe9375dffc7. 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/FRZ511000242.
Voix du Pays Basque (Versions authentiques)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6a6102e354acc25bafb82debd2e6f179edd8b693b628d221e1156c6724fb92. 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/FRZ511200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c010af44d4e6bdef36cf174ae25a3b8cea40380013e34d67ca9eece6ae265. 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/FRZ519600505.
Fais-moi Une Piperade - Chante Pas La Bouche Pleine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7227b99227f6153894b8583f0948db81704ca684f7f0b36e23d0872d0f4d48b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRZ519600185.
Florilège des Plus Beaux Chants du Pays Basque (Festival des Choeurs d'Hommes du Pays Basque)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7adfe129099fc094c8ba870b9c58db2c1234439b10eec6bb7ca9a42a872d9. 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/FRZ519600489.
Nabuco : Le Choeur Des Esclaves - Extrait
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2bd29d0e20d26982169fa3e2517e9e9b0628841e824d0ee0bbcb8859542ce6. 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/FRZ519600504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c010af44d4e6bdef36cf174ae25a3b8cea40380013e34d67ca9eece6ae265. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ519600505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe541e1d916691a0089268ca41039bacd0c367aeb6b1631e5944e5aab8eed16d. 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/FRZ518900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aca498a4009e9d007bdf4004d9e6ed5e169af66d6b2fcfa95b3622a0ef156b. 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/FRZ519500004.