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 0xe6e48811bac58b110e1e371cdb200234cfafe07e95844cf3fedf0eb22e8d0b8b. 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/bddafc71-e7eb-4316-8f4e-43460145b872.json and https://artists.proofprofile.net/proofs/artist/bddafc71-e7eb-4316-8f4e-43460145b872.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 0x27e914d0d4cddbf98242edd44f88b133820fedd6184c5664e28122cf70cafb9f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKCE22400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac8892cf38f319715eb5535468591afc92b1ee6d99aa720f895896861ad09e6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BKCE22300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4a7ce69ecf1cd58d5f8b5a517ec0ef90dd7cee1789b6e9cd42c0952db2388d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BX4IU2332472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ae64588e1a703e39ca1aa07050900f60a488f8b921f642f815eee214560086. 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/BKCE22300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131c8ddaba30edfece2751f8769ce0deec43fdbdf7946aef25c2a4a80a7e00e1. 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/BKCE22300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee036423ebb52d7fb25934662ab89df1a8da250a4314b19c5652f682252234c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKCE22300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc7eb364b12d9fc7ab859e38b939aecce0a1098d0b0282306713bd33f40c71f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BKCE22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f423e10774316e70171cbf2645b9cc712169781dc2f77ab36975616342f00b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKCE22200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e0aa7ff6c11dd7261ae572cc3353e735fde79a1999d0c7e9801d7839449a7f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKCE22200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce7821780e11668b23fca8b3bec93d15a3ed7810a3471c9f6630f80a08eef0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCP5D2400003.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c85f3fa9e4f6a396f74dd82e58e13393475c70c1b40be0a5493d46cc961bd6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKCE22200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a55a5ee3de48299698fef1d52cd2b301e01d75d04117a346ff9ab293f9f3f. 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/QZPLS2229416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c37610115ffe65bd4ebfa915975b4a8ee5d222fe8798db8cce4a0663c9bae60. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BCWI92200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a93e763ee3079904cd68e7ffbc9fb1d46a23753be8062446b10e5646afc5b3a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92173458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd2aa9a6b610940061dc1ff9ed24ec41967cea49287d9bffa87ba1486cdc4bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92500946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b4b4cea01948f289a18fedf8d35ccbeab435872b172b5aa0ddb38832755ec6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2542039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cf9824c43d2de137f7c72fb02297380278133c81ece4ea1f612c386b701cc6. 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/QZGLM2570933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda952ccf840662d2037c79cae84fa0f9abf027d4fcf6d449445389ef935f82. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG2557048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe03120f7d8e2479d94bfe8e5467a13e178f381120775f13d6dc2e9ba268464. 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/QZGLS2541393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a4634b024b193ed573f7607c175244f1c12c58046f8b9db2b1d82e05c9f27d. 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/QZW9M2441080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a9e91b7946f41947f66f5df98a777de96c0020187e5dc4ab42eba147f4361. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKRFG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e4e226c76bfb63dc006471554f49a6c53b9292860712bacfa438f4638d4e82. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZW9M2419071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf78c430c65fa7ad23d260425a2846b572400e31d637b084975ace294364994. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2483730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a838ed7872b3cc4ca1976d5c8bb82da477a09632cf7f31b76a7909fe6ffcbec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXTB12500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aacc93c66d2f532e9794a3ff72c730c5504b92c7c6464368268d64a3edf10e. 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/QZNJV2503121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e4531d32bb7320e69511c11a5408ceed464df7cde4a9a251bdffddce1dfaf0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBWUL2573893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89448cab9f62e91a6feda2558bef8a90310b95c98fc1d21f819d7fa1d19ab3e3. 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/QZN882566925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f2337224c3779d35b6aef86887b8a7cd23e92d32b724091f83151ec662c8b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882431396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99cff4d0dd2aa3a7528ffb2b108ad38c2229643edf71774e8d43bc1fb405929. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZN882431395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaafcacbe9a6d58942904da81a1a64021d95840a44f03ac6c9081f51500ea77c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNJV2583501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7336084c29e126c99beb43de6395c447b7bd5cad866a1aa6cfa750231ca51a2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA3A2149890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74b55af6240f623d6eba5cd830e18215bbd8f8a2469696526f9dbdea8f30043. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZNJV2564734.