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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c673bfa36d1fae4ffcef2f2ede8767d19af482091f75cf37a1cb2b124a52250. 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/0292f830-dd4a-4d2b-b914-3f7bcc50516f.json and https://artists.proofprofile.net/proofs/artist/0292f830-dd4a-4d2b-b914-3f7bcc50516f.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03715b05be8ccc8c1c1cb64467f5ba183ced11edac5490b0cffb38098a0bb6f8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QM42K1792975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23a8cbeeb8043f727e6403900a5a9adde11097d339fed775b5cf51679687de. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM42K1756406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc2b8aa197e65f4c640063510bae8ddbb0b964eb79c3a7bd3fd67c83abdb4ba. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM42K1767958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ccae892058107c50c9abe3e2e3f8ad52364c889a1e2f443d892ab07d91366a. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZDA41826464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cebd8d143fcc4c0d6365fc925b3c1cdd110b6747121cbada1214136b4faf6e4. 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/TCADQ1870006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd5a2bee13e1ffe4b1458bdbb06cf68ea57dd69c772c4586d57f8fc512f26e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ61968643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55556a157d30e16afa1640ecd1a67c68584a97373989bc13a9014340692d563. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBKQU2048387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d530ea2bfa889a17e487fb1ad11007ec13c517006039f448385f77d726f481. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/US3DF2089537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be8f31b092457d18589b823eda7471e319e15c45ed7fdc2bfb61fe22da590d4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBKQU2101829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76765e8f71913e560a518a6227ea52b6ca4545cb7310b791035bd821c02d211f. 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/QZMHP2072130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d2431b1e735a687d03bc3ad8d61b58db9dce72b257d0c2e0bbc89d49c068cd. 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/FR2X42268433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80708917b4d3a5a0b1883f02cf53029edce7c7fbc756d6738d9bdf50b4465b2e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZMHK2332683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cb9d9faba57ea2384cfb52656a396f62e5fc7aa1e35e8b01a7683bd257e252. 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/DGA072368324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d56187ad4b8e6f4239a342a2479efe6c87dff30fd95934edc46c96830d868df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPEW2456459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d530ea2bfa889a17e487fb1ad11007ec13c517006039f448385f77d726f481. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US3DF2089537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1eee43e3478f8a155e595b32b62ec5f051e2085c35af060209e8aafe2233f5. 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/USUG12106651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d8cf096c75a09e6bc01df32117635e8db3a3aaf3214ebb08e252cc00560a8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2197033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f135778d0ea3ea45111528a24411ed245583a9e0745201f10a0e9c312455639. 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/QZK6Q1907026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df7a9d9f37083bc9554462b632ba5ebe67a3b71217579af02fa44bf460247c4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM42K1874817.