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 0x3e6ccbdd08381e407eb30b38054904e0d0584421c7b56ebce79d6ffa497a5cb4. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73f0c2bf-1ebc-4a48-a77b-dc76d532a90f.json and https://artists.proofprofile.net/proofs/artist/73f0c2bf-1ebc-4a48-a77b-dc76d532a90f.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 0xbd9e12789c7afeeacf03ba6c98ff57ba735a0f44fc8faeaf72d49b42ddce8e8b. 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/USDXS2012613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c00a8014766a75430951517c881bca9ef76bd4133ee2e266d983286d1508b3. 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/USDXS2012616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921cb7118fdaefdd7f0504ef3792259d45b64bcc1b89f8cdbb7b5f64173bab6. 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/USDXS2012617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396daa044eda53cd7f50eb9c0f9c7d5fc373b2bcdb172c4b16856923c8f6d1f4. 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/USDXS2012612.
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 0x54dd577575e5d0c3d62e217fc9abbc8494db3c4b6e7f29db5c763b70aaac1817. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USDXS2012615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88320c94ed71e30edf887859dc5906dc38ee40627e4142f327738275a8a5a92. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USDXS2012614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6576fd2f9107e6306d9d312dd4243214398720d015a7df18cff224fab723d278. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USDXS2012619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed05521e530140cc1aaf19d88eec99535f53ccd3b28ee91bf451ff16ff3525. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDXS2014141.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa57f0789345b2878703bfdca033478fe33aa77d3ca4966a1b822c3458a2d9e0. 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/USDXS2005680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659954cf4d3a539202e04d9db3830121c2a5c1c681e5ee3f5216b8ec5f9d07c2. 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/USDXS2005681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980bdacb0d06a74a38d55edb102598249583d1a1f71ed8b9908ac4cb59e181b3. 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/USDXS2005682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec80b9cbdeab61d3afc3ad17441aaff3636ccb9d56fca85efeec62bd78487ed. 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/USDXS2005683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259da7918037399b82945549f6826868d3c9dc418668f619af9dac786d0a994f. 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/USDXS2005684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3cf49f6872422bf7c05c85c1cb131eecfb6fde65b4540c1218296f2dbe92a. 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/USDXS2005685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd727627a3ad9fa5480b86c9e75d095bbb641c12d32d284fe0651fb2b9a5e1a. 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/USDXS2005686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907d2e1511740986b77b801f12bdca331a158b4594e8363ece3ded1998a9821. 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/USDXS2005687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc04c6e7d36c7cb08e0c261dcf68aa8c73f9eee54ac4ab2e8d92dd363eba644. 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/USDXS2005688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373d8bdfc4cf59507d4fb7c1714b8c73fe666a3abc82a36c06101133eccd85e9. 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/USDXS2005689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4dc1195c09a39fea3c76807f377aa22cc60551fe2218f55e2782cb0903402c. 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/USDXS2005690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad806dbc687548575b5fffd7688f9fe1baa5bd62bb694ac0cf0b6aedfde93fb. 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/USDXS2005691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a26c8a1da7a5c8788c57e70e8109282dabffe9c025d82584b39d9969ac8cc3. 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/USDXS2005692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf98258c2f50456bf875d33a5a0b199cd2d66b02b79031744ea0b141997ac7b3. 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/USDXS2005693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9f77696313fe1094689c96785a66cc3f5a9db098428ec7e2c98b486c6d6e2. 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/USDXS2005694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0a28f5e8fab32ce9782fce67baeedd61d2d245771b1fdbde6204ccea88ade. 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/USDXS2005696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925733590e28d014b460cdf579586d6adf20a6c575f352ecb36e9d3b71680f53. 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/USDXS2005697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95d7388673cf8c5c4f8b6a4d6667627082c7618d18d0cd2664bcbc444815b6c. 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/USDXS2005698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e6f24ec4b519f35efc9d4ca8d0ffb15c5bf0aca6eb29cc703a8bc842e18106. 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/USDXS2005699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ba8746b4d01fbe55ec0d57b2e998c41894a20b17d9e7ec70c917e49e229394. 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/USDXS2005700.