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 0xd175c12753c22ac14aad4e629e9bd30f55266ab393593d70b8cabca704d3a4c0. 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/83323f4a-fb2a-4475-8d96-6ffa6b9c0acf.json and https://artists.proofprofile.net/proofs/artist/83323f4a-fb2a-4475-8d96-6ffa6b9c0acf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x59f6cf1b14b51415838defd6f5836b3a29d28a6399aea3666f308210f242d0c0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:42:42Z), 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/CZA231201844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07517ef52a9aee582d2d139a243828eb77e2e6d3520a174587ed3f02d119204d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:15Z), 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/CZA231201848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ea706c253d8b1221c76d7cd9193136953d14e3439193a7b0dfbcad0282fd1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZA239400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb29ef9726353b0ad44e784069c0e1632966e2c7f133c62f71ce9bd40b10834d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:06:05Z), 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/CZA239400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c552cf6007dc10b85434b33bb91c1af86cb0dea7e62396e605ee075c34a2ad8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA239400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc9c17d0eb78c06767aa727d1a8cf4c151ee1a9d562b265c10c55495cc4dd8f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA230400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda38cdd1f6bcfa6442c1d5ae65f5644758e4792768fc43615c3e6d249005d5b4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:12Z), 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/CZA230400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf155f28c0d9be2465f50f56a72bca4a9cff68e0e47c7534c940b93a26f77dffb. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CZA230400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20c9c490070a087a507ecc0333ed87247d86a85395468328dc936688954839. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CZA230400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae22c0d5b7f5db834dac44d69083eb03f8a1f2bb2dcb583cfbd582b18e97d39e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CZA230400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5dc50bd27f94df4fbbda0fdbd63c6143c2355bb36041d6bb0036ecc5f5be5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA230400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18842367b00af0442b853b135f10e3bf7c373c14cf6696548ec59601e45a19. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CZA230400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083ea70dfae3019774a1f7bc88d4655f3d865bd545e8792bc343284078429576. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA230400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd972994a967e3b8ebc029f942069bd5f9263b26c66d66dfdeaf00b1db09f03cf. 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/CZA230400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a359f8bfbd8420156d4dc5f55c95474e22860626245b68f4cee8ae11c6aea0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CZA230400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466635b2727022dfbf94a94befd8d1e604d91f9f728e6429b1f590b27289e727. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:17Z), 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/CZA230400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbce66b8be86f96c7904c8fbe2f7fa763e2f8dbb925e97560b8126ed127eb62b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CZA231100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54dcb40610f21a05147d4a3dafe7f45c78c8fbffd97919d536fdce245eb69ec. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:47Z), 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/CZA231100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabce20924edd97c708f6ff6db9771463da142928419184415a7e164eb177666c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:05Z), 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/CZA231100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd95fc8aa3180ccc94e48670901ad6e6e3e378a0e7b458d1700f8fa40d294ba. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CZA231100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d48d160e31edff824c5e11eef37c6a242b4e7b68e6a276a0dcfc9631cf5822. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CZA231100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46cee51faaf5586cc8a3f996a38321edd89b9fb04e6d5ee7c8eb76340c347a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:21Z), 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/CZA230400362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbd2fc48a8f3c0075fdbea8b27fc7aab9cf65f0eeda83a218ddc471b769a19b. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CZA231500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9268018adaab8419e8a67cefc93e9bc0307e19cdbcf47249b0bfc215f9bf935. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CZA231500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41508100d77e5d6ead20c071977de31b65a651f771c2ae55d047300ece0b9f04. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CZA231500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3968ab4d26c5111fa08bc7023a4d388bac33de187b3a7ed730b71ffa41b3c0f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:29Z), 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/CZA231500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4195f636d733234c8df6624d7ff5ef61790b8419a92ee160abc1bdb09b0093. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CZA231900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e70c30f3e46ad60082741ef1395702cecb9f9fb00bfc373ba638e93ff5f888. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA231900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7e6e435c4415f9c164e530dfa5c9c4b9ebb56f2c2af20b06de1952b065374e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA231900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0dfd0928cea89d25e59ce355e19fb9034265f228a99a23c10fb416cfda7771. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CZA231900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f48fba767156d32a48e3f59b7f171105ac542296af5786c1dbd51609f051b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZA232200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d7851a13ccf360cdc4feeb542010af6bfcf0201d96c17943443aa373a31d3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA232400553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17039d81581b81ed3b48c8eb8210f0c7cb5c75861a38445a739f433ef4b34efc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CZA232400554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e0f39f289a7fe39f27ba14c3792ef6a2c92bf33d3a23671bf4f1fad3ccf8a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:08:47Z), 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/CZA232400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a152c477f9a1392e09ca2b4545875e7062d9c2a456b65417e7dc0a5799ba1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CZA232400560.