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 0x945024b7e32dfb58b07f981e26f243e925ee7c7d03a029c959b478d1011c26cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a631473-843d-40a2-9c64-3c2cb1fd46b0.json and https://artists.proofprofile.net/proofs/artist/7a631473-843d-40a2-9c64-3c2cb1fd46b0.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 0xfb66b257a60b0591f031fd0661c529e8c16a83bf7d796f930be1a40144413760. 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/QZHNA2207731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43456bd0f764919ae2b57ce67650552895310f328caf8cb7b7a89dc78303f6ff. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHNA2207740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973467aa28d9fdb0d9ad0b798850fd8200f8827df596e110e8e86b7a53d5711. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNA2207741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a19d317a98e2b521649b87e95ba0499264a4b3f992af97f54a5381c6048f22. 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/CH7812235228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5adf892af17c235079b54a1cc1a21ebd6dfef64b3449dbd89915121d4b015. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6K2369440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dd9cd44a3db40e9881bb3a78b0f40d857d64e75fdf6653dfd45b925b0460bf. 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/QZK6K2369441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285955b0200de24b214ca9ca7dc87b726752c2a2344a0ee2fdd118e153ff75fb. 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/QZWFF2394338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0162bd910a2e8206b74df717b1b95610526704c929c132fe874c50c21807e2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT3EX2417855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf57b30f92eb91031892eaf1ba9bd331d3b5190857f914f830fdbd389a147362. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:42Z), 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/QT3EX2417856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fd51d362579dba6022ab1429e38247d6f690f7c4cd137f879c5688a83633bd. 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/QT3EX2417857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9220a036a6777a96619d9ac782c321b32ad6cf2300a9b422f048a25b1bad08c3. 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/QZTB92522729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a7425d3adfe1392b4b1b6311bd9bf21bca59ec98603497d05dca6b5b2efdfc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:25Z), 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/CH7812540731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ce5a27a10a55c3a95872480fa2b25b29ccffb4ace56543a2748d3e9d0b3986. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH7812538879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a7425d3adfe1392b4b1b6311bd9bf21bca59ec98603497d05dca6b5b2efdfc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CH7812540731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35a7998ae6b16e069dcdc93e1cf41620226e1d09b907c60d4b1d4b7314ab723. 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/CH7812542654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08366cf76dd5761f2ff32d38a1f62d0256a8f073a7e7b05a321453b471a71a9b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812542655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ac4e2a756eb00590109a3a63320dc6ffbaaeee88dd97d3cf3ccc6fa86797e0. 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/QZWFP2565383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a67974adef29db23ce0e25515e7aa03774063cea100836067a637f59a1320eb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:25Z), 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/QZZ7L2525989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31649da82dc4c494c552231818a64aa9a211d9b83dbd2b172032720ce41d6d1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F22534634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdfbb2f80817051f105eee44ca448bd3b834d07e8418fc6608fe9e3d26e04d6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN32429342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e6ba6298d62c1ed952e551b18122513f18da6b3c09481f8c8395f8a3eae557. 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/QZWFJ2370094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0236a5fbeb39b5c34982863314f53b2057d63a62f8e69ac15a1c3eda7039185b. 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/QZNWY2009493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3903d1e0dcf56e583512018763818c54e41b54543db0bd189aadc30de06d0a. 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/QZDA72011315.
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