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 0xb22731a255d92a697be11eaa0fd72397b8117dfd43c78922386592f71dbcd6a2. 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/f89fd60a-f69d-4a4e-9675-8614a3f81e21.json and https://artists.proofprofile.net/proofs/artist/f89fd60a-f69d-4a4e-9675-8614a3f81e21.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 0xac5d36d42dbe4557b243700caf078fadd6397c8de6328addd0db7d3fdcf84fc4. 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/CA5KR2208784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd898af92fbb62a3d57f2cd85dd1e12108be72995bdeb3df9a757ff09594c36d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2232325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cef7d01160aa818b7bb35d5ebcf23645bd75797e22e26a7e89bca97f63195fa. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPLS2379141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b373d3e0019b4840cfc58c96c73edc739b487a501c079f687d01b8b827d30e. 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/QZTAU2339653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ce0e4a1f0ab2081e513671dd789beffb534056161ffd0a51c67d80bfba14dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBB2379280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c2633615c846dfb716142167c0118e4c2131e43f7108f87f7b16e341a61d38. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFF2351177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86350c5f9abf5db46a927b51c4e1d0dcc8e4345fe298f2ab4068955d74692add. 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/QZWFR2333860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b57be0099b4ba6f3a25f66cfc262af0023716d103d816afc063163b199fd8c. 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/QZFZ32445026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd627769f9c70e7e046858783cbd248baf8342b664b8d44d9b71077902e99e. 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/GBKQU2439914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ff824789e679bf75b1609d57c95f255337640b0f1df3cafd9ce60dd248e017. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2439915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5ddd4659f8a5e5d671483d404cddb3402399bb7dee762224d30de985cd7416. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:43:42Z), 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/QZNWZ2499926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd783ae49c140a35417ff6fd52cd718ba19768ce16469b29304a7684e58137d63. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:00Z), 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/NLHR22400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc713906473e11577dd942fa1a605d3519aeb7e0346e12d68bd5d183288d0c7. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:20Z), 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/NLHR22401183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00835671ddd323eee28c16013164b7d1b11de9d925f5198af29598e9b0feb72. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZEC2425821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccb39955047efa59485136294ede156e011b8c57f6fde176952f424a71fb31b. 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/NLHR22500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a3318995625fd07649f90b8ba4191688f93e7f2d7a12f8d0b5dd6b8349f232. 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/NLHR22500223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d87103e40d3a1021e5088e1762e966c9fb6982f9d3eabed1f5442d3533af6d8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLHR22500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a62cab5956ecd52fe6503d87d38d71bbd0f7068d0b5c9c3323dfc38c9a653c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLHR22500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c43c044704d5cd4befa60ce8f4eaf8dd70e878d9b67c4e748ac1d1703972e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NLHR22500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade20adfe8b365d56e1f2833d5b24340370141c8bff78dc0db10edc1be26467f. 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/NLHR22500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea7a531308a6b5acaab21003bb4fc9f33f1ef7913be8af917de165f33c57fc. 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/NLHR22500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f62b63be22010d8cb15d8fae6473c9a6c14f315548ec78ac18691b8c0462c2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLHR22500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd351247dc6aa5addb5c33475f82c7fc9a01a8b1f30ca8940682398dbcfdde8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLHR22500578.