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 0x540ccedc39925d5ceda8c2ddbcb574b9b57c95f47ca9d3c0768f1b5577222b3d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/871d1b37-20a6-416a-b4e6-d407aa28ea51.json and https://artists.proofprofile.net/proofs/artist/871d1b37-20a6-416a-b4e6-d407aa28ea51.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 0x388d177bdcda3d276f50cc83e3edec40849bc67240dcf239bb6f9e8af7368883. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:10:07Z), 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/QZDA61982496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5479b012347ce1e0c1723a2a3757b31ebbd8aba58e832a96fc4f3d4d6d80e8d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA61978481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29edf11f722f5334c2235422c51cd8125306c2f87e585849d056ac0b68a7a89c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEP2053285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0934a54c8d3c04726301bc2e830ae5f6a8eaa262a99b22e6900c9b51b0de5c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES52075404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3296782031cb0a374740bc4b9f7d745520a9d21cf34ba71d5989e2dd6394892c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHNC2036755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cacefbaffe00b338bb1f0381c89a82f746c2ae3e32caf3a3c88ef6c3857b0c4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDA42001452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf432ae5ff6bccc7d70bcdb2d931b09f4c0972d5364aa659ff877f671614a05f0. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN72024215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41691bf2a38a1f67632c98ff60aae7c8f9e0912b81037385da12b272a7cec357. 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/QZFZ32140402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3f210cfbdda08751a25b5bf34da04ec7dc6661e495adb208d54af5062cbe1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDA82130070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d95e840487d519df854d0516c4b36783db2118c1521a3a20906f86d793b3ced. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN92104887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b65924ea295cb7d0b8ad4cdbd1d187681df0114e43700baf0013369919bc7a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNB2243763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf650763febdd4f615f0bb36712cba6f99d15ba0516b24399a129c30134251d5c. 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/QZHNC2495143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12728de9509e4e22d86599c684c8ae656f5841a24ca80334d5d8ee39a49d262. 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/QZ6K42400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64a52ecdbeae71a5584c711880b13d2fac311a4e5659675e1749a7c3b252893. 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/QZNWZ2495417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b149734eb0acdbbd1d00f7db7352a190d4a4abc14915d5612fc9aaf502908. 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/QZTAZ2437862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf440dfc659dfd303bfee7bad4c53c25d6eedd761150e33706045e4e487156d26. 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/QZFZ62475052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba3cc5638fe9b039e9c88097cec4f02a6ecf8c6694e7ef11e47e3694e15368. 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/QZWFR2494449.