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 0x13cfb30e680d99f9b33709a8b78f0b306592f04c1758d7d27680245a2e9f3c6b. 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/f9d7749d-90cf-47f1-bc76-e911139d000a.json and https://artists.proofprofile.net/proofs/artist/f9d7749d-90cf-47f1-bc76-e911139d000a.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 0xbac1a1e782bde2c5fc70985b599fa7871c5dc8da4022ef80a7290b39ad881efc. 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/QZTBF2412309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6f3efff506fccf690566a485b1007021b5090cbe0ca24f987921a52f065a2. 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/QZTBF2412310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf266ab083829744a39e12a9a4b7377ea0ef2d041396bde663a66cec7e4e1155. 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/QZTBF2412311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29319a74d593afae706249744446faa0268f88e41b9e76179f158b9ae10cba4. 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/QZTBF2412312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd612a24175b1f01b0b003e825634a6013da87a5f12b281134b30c85e77f53249. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTBF2412313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbe43f8b83468a875dd8f373ef6a2f309af48eb7fc3c01a56c1f23baaa8c22f. 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/QZTBF2412314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498e3e46212e8772ffb3bf6065dd5a852b287cbab1ab2c6e5746a877fabefea. 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/QZTBC2416631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26159bfccd4b68d988680ad126649358bda571cbf87d8b56277d7e7123efa5ad. 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/QZTBF2412315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36ce2bc8be0a2a932ae3ed901b034ad73879059bd07ef5ca63b941246f902b5. 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/QZFZ62519442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0ae3d9e45513e9cf1e2d8fcb6464d9f0d0de1e38cba5dea6034f929f404771. 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/QZWFX2494794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40ad116976723cb3f916aa69a3c84df18d6ba0a8c46eb32406fcc9c40dcc395. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFJ2447858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480f31c92152887bfbce8ac2fb70773e8ba6760603e70bd301dedf0b0ea6b6ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFG2465948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498e3e46212e8772ffb3bf6065dd5a852b287cbab1ab2c6e5746a877fabefea. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTBC2416631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be3542724eb2e2ec7681a2267c78cedf0bf71f501c980148f06fa782524941. 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/QZK6M2475309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f1e18e234c4be26d5dee92fc33484d30707edfd566b67f6427720a6112d8b. 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/QZHN52427099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eb005a796b6b7b312ba88fd8ac5e22dee7444b8a88418c494816e9e0ba1d37. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72444925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c23690f6b68df5024429d7e07e8563c84b03ca646ccfa9920e47ff919f377c3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:55Z), 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/QZFZ72444926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa517e639b40767dbd7d5a49d91fe6748fcfbdfcb7bca4ecfede46b2648a22eed. 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/QZFZ72444927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c8d62f8ef85bc66dddc641f121658bb3507a681c9e4be1515073981839044d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:05:52Z), 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/QZFZ32449177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb698128c9b5ae95ef15dfb189bfa3fef9544e9df71f8671474e9d3d3b0f7fd8a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ72444928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c8d62f8ef85bc66dddc641f121658bb3507a681c9e4be1515073981839044d. 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/QZFZ32449177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad601ae666239143c7ae508c82e8c6f1d2007fa5123c857aa614d76531bc420. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZS632291151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a69bf60f9dccfe2347e69a38993de0e9b55b8b053da71d9dcee70416938dcf4. 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/QZK6K2439106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68200de7e0121e0fcca0face0da58ebada7d55e89500a48ae0ed924b372a5a1e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEM2480320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb839d7f92fe21a594d855e6350041e5fd2392554fd6d32f309a2b9cfea253b3f. 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/QZMER2404235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f38c9b73799737c90e54291a413d98db40e47027dea0abe583f9ab162eee3d. 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/QZMER2404236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68200de7e0121e0fcca0face0da58ebada7d55e89500a48ae0ed924b372a5a1e. 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/QZMEM2480320.