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 0x5c25f30fb9727f642b8c8639fd32a572d50e7dec30494afb24290886c671ac33. 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/f9e061a2-65d7-488e-af32-5a31a26826ed.json and https://artists.proofprofile.net/proofs/artist/f9e061a2-65d7-488e-af32-5a31a26826ed.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 0x8ed3d9ed0436b78f0975f7ea1f2646f85bb07825f73771f46f311ebf97c89a75. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:06Z), 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/QZHN32536397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b128bdc968205623baa6e44c793621228a77903b0759102aad3dd987ab70e9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:24:26Z), 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/QZHNA2541277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa046ed37335642a8f8d6c71bfaa8230487ffa0cfcc0e45301e67ca6b4bd47b96. 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/INSN12502208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56738114530de31ca0fce3113fec6ed55f0bba4db1bb7568d3942e319bd64ad. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/INSN12502209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d4c82bb0abf923619015a12bdcdf45203b6e41ad01ca35af11b41c9a72c80. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/INSN12502210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2b0bfe06e9e310f4de144f1ada77b3cd84cfc3d09dc74eee58dd9694eca9e. 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/INSN12502211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796248f1f003b1c56f2dcd6eaea620c49df5c922aa6597c2c1a5292cc6d42ae. 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/INSN12502212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2fc35fac17b8128ad644e9f17503a298075ba7c9d46ebe0b410e2c4e2b8d01. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:42:03Z), 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/INSN12502213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d285cc121a1230e12a14e731b5121cb810f8f3446be48973a51ac05d246de1. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/INSN12502214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424f985fa5965a2ecb59c4e7fc326ce6cf6d3c9cec2e718acbf3efd8c449e160. 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/INSN12504779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d78869506c8ee52a8f04906f89d2ee4294564e024ddaae70009d250c406f9. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/INSN12504864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd86c6bf2517547fd9ea748968bf7a2a5b75c8ebbad8b21c80dfb68574193b0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:11:08Z), 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/INSN12504865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f80264f34faf2aafbb112609c785ab93225407ccde99f5619a3ceb3a9d7d8e2. 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/INSN12504866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bccb161ee169e9c3f4a2d457281ec0ac6e95767cf0f4b35242f702f5451bae0. 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/INSN12504867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4774bc1e22e874e2a65b75705929ccf4c5e89db3ff0c1f9f69895668b05197b. 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/INSN12504869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbe27bbc7b5bbdf7f85edc7dee172876ffa8bd2a5d224e6bc2258d5e631fcc. 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/INSN12504870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c355fcf13a2761912b3813d82efedc8c50ca4eef091180d4d0343be39119f4. 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/INSN12504871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935a86d29ddd60c937ee405c8cdb2d12ffca2912191f68f9e764df25554af01. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:29:32Z), 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/INSN12504872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a806ad0e0c4e67763dc295f1426877d05615e962ad6c7975c7a27e3cdd1493. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/INSN12504873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe061bb03ea46d2db48000b82189644d1335a671041c76062c79f13756a8af. 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/INSN12504874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611f00afaf5c81da58be0d80bdaf1c163b0ecfcb817fce646175eb7b258fc6b7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:32:13Z), 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/INSN12504875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f5429451acb87de0c9c1065c88957784b766b8c26230230a6f99c0f0bba629. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:52Z), 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/INSN12504876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10370526488d5d6a121b490bb3a3ab836577e1bbcb7dc8985a28f975e50ab3f5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/INSN12504877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc87f87c1b3f2187748a264e0a2fa3fcc6685907e9d3b4d0097198ae1ed259. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:29:16Z), 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/INSN12504878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0120643c93cb9270fd84c82fd317a19fdd6dfef5e6d274fd0f128623396f7f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/INSN12511774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c17af3a7c0d0de6ca15cdf45ee7107b561b7a69fc59d7904ffdbcdd563c2b2f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INSN12511775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11917a7c54d2e67adb66d06d7c1cad89ba507ef9f5f3cd23105d39ea0fa52a38. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INSN12511776.