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 0x7ea832e0c39014ef98706498ca1656084cd1d0b1d73cea109f62c0c06489cd37. 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/69135002-b4e7-47fd-9fda-3cca7fb9eec5.json and https://artists.proofprofile.net/proofs/artist/69135002-b4e7-47fd-9fda-3cca7fb9eec5.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 0x33113391cf7dda1d8988a4d8317da424d077a62092cd52124c6f42fd60cb6c06. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:52:41Z), 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/DELJ81825981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02317867828a6a06946ef6dce5e0b3dd324604958d6d575b8fb849ba240982de. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DELJ81825982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa847d9053c0b1f850e7f09d3360114e97e393735ef1634a91813870a81273. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ81825984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804164d5ec4da23ad01a7d263cae890f6db5f607ae2b65b31ff42a63f4b092e4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DELJ81919948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798bc78367e1a1de5000e1fc7edc1eaa74a5461b2f0e33df7b61553c02c88ea5. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DELJ81956030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa20ccebb94fcbeb2617f2639cfc9bab5b29e8b96cb080c1e3ed8eac6578fea. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DELJ81956031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c6dade2270fbe1b31681697b1cb290099950bb812d08ef158e098eea5af58. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:20Z), 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/DELJ81956032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745023a55b0ee003d4956c2c052bfa2c88fefead9b79673ae54625445b16125f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DELJ81956033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb542d3ccf0f98a93ed1234085e9e18cc60edc34cae1765dee7e3ecb321201bcf. 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/DELJ82011361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cc35f6852e339c5b14afbe1dc431bc30ae8193476249f65e232e4768a81e04. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62017923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3fd7413b1253e7d4aa13214832d38e14793a539a45155220c49204ce75578f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEKF22100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1af9888c5ab4e7055cd26d6621be0803e4b4c7097c730429b08de630b4b8ac. 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/DEKF22100398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b50efc4d780170a875cf1d7c4424189600f94d051a36b1607594e2431f7e47. 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/DEKF22100466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1429e2af792337996fd4ebc3b28e8a95efc4db91c9bc12cc5d423402fa7991f6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:24Z), 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/DEKF22100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c11343db307829d3bb705c008c87fff7edc61643f56233755ccba3e1e01900. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22100985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b6825518febed75e3c33769efd9ef43117c0dc6e301f620ce8872dca0a9e79. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:53Z), 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/DEKF22100986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c20e8feefe2731814ffc4a4aa3908cc5272d148d9daab23368da01c878ac3e0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEKF22100989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232d1290537d336f19ecd208cea4f23eb5835e6be271ea49d38b0f18b34c59c0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:02:21Z), 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/DEKF22100990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9173f6269d360a6c9f1fdeac354c11b0c5f395a3682f2b4d3f427c21aa7485. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEKF22101051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb586542051e3d4741bdd45b1f4ad478b5531c3787ca85d9cc7f01a2c74d05d2b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:28:37Z), 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/DEKF22101218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb3cb0063478d1e40253c0bbcda4860c5be09088b94f16c75dc3d2d3d96263d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144e8b022e5502d277dc3fa94652650a4cde8225346c04a58c9c534f41e87f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c314b81a2df6240eb964f91c3b7c43326db5e985ba8fa49b7c7e78455314a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ec373d6f6e8aff3317059e2f86a79b78f28a7328aea57caab5b6097401124. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEKF22200547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd0712d7387f399496866414a483799eb7542e0b6f52ba829782fdc9941177. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22200813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87154c3449dbe13389e6bc56c56d260fad53bc206d5f19807789b990d7514ff1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22200861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a44d5b8c3b168855650f60e75f3fe0d96bbd9747ed2e479e72c634295cb26b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DEKF22200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d03ab9b65b501a550d405e4fc8bef4d72ea4e0ac002f423e588cee9f9b58da. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKF22300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb683d72170d34e1107941652506090c12b83804c82f15e9a3770b06a02482d4. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:20:02Z), 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/DEKF22301277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812d2f419e898631dbd460e21cea76b4675a0e1e49a83ed088caf1d4be49841c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22301439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d58f55cb25f85ce5bc0d2908d7a5b6a247f14244e92cf861af2546131259a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEKF22400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60219a69a87de65b9342c157408456ca53e97d5370cff56af5cbafb3a38ef95e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZC62452016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b89e05aee9898930e6d4e1fed801a7572cd985b8fd694f6e8c5c23974c730. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:31Z), 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/DEZC62451973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ea7c9f8b5e284d926bd8dc3cd563d2c8093d323a4f58a575a6e70b664d45ea. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEZC62582643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec421d85f5e29b6cf6194c74133fe7a55e96e84ee10e3fcf739dff353b73e7dd. 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/DEZC62501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68100e0ad1e3c2464ae3394e770ea08e9def5bfad3939c96886b7d621086f9f5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:33Z), 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/DEZC62510191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68eda0b98c0f8ebcc2ef638813fcb7852326b4cf7fdc9548dc3954fa17df113. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAT2244185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f308b880e3b19f3964aebedd754fc916ee3e5daa5f779f2eb7323d14a723fb. 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/DEVY82300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3564066c0c9fc81f453497dd35ea0bd1588cc5ab03288d6c88a5fab0eb71087. 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/DEZC62585385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8a7eddc3e0dff6e833e294602d30989341a935858e8b0d2e6355104de620a4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEXK52400421.
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