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 0x9db95fdef413809829dbf6b1f94b78210d7090640f8f42499b36507148d6ee5f. 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/8f444237-d4e4-43f4-bf12-b56cccf8c724.json and https://artists.proofprofile.net/proofs/artist/8f444237-d4e4-43f4-bf12-b56cccf8c724.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 0xcf69862210d6e830bce706e2dd53b76d7ada5b4895da674f6480baa68297e563. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FRX871533527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b625a4188ff5f23d6d10281aeaf22084355a39c11b47e34b811f150e128d2c3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX871533195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a69d04c189ed7289c9eff77902f2d7936b3b401538d718afdeef3c1047018fe. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRX871533533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9b086b18e3ffc10c12971bb76136c2952e2a20d4d2f127939cf4246973f8a. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/FRX871533537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5a9879e8f505a20557f64b92d0f16dfc85c0e89338a9b6633ea3e422116d43. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRX871533539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4297593b6889e7142b50fded72f3d1db50fc15d3405104eb0d6091a237eef2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DELJ81603710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80545128101b455a677e274a9e47310a46b7782e91762da593a0a15b3c900a8. 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/DELJ81614767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76d1f94e4699b90a01ecbdc45490a26573f1069b22b809927eeb2102bc3d2d. 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/DELJ81617434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dbef612750ce6bbfaa545d31e957ebe7bb38a5b821f1cfefb19ac7d3ed061a. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DEVY81700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77229751f239e5d4b7faac7540cb34a8d1f6b0ebcdf7dc57903527f55cffa6d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEVY81700230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96aa3daff2eada34215f0e755531f8db90124d05e2146ad27a238cad8ceeff5. 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/DEVY81700650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddfc2e71673928925f817971d20d5cd6a51ebf92cabf5736ebbd6f92bc4659e. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/DEVY81900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e73579eefca27e09e2eb81b4392794ab453fb83a820dd565f2ed432856b86. 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/DEVY82000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f5598d0ca5726c9fe940f219deb3ae6efa84c677dcc32230be0ad7e84c6d11. 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/DEVY82000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca44e17bad28510466e148dc770d80cec9e8f616f7254a5a08e415d5a746683. 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/DEVY82000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1a6542a439900573ad897a257ac44d85173fa3a55aae8404e3a65239c5659. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEVY82000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62372332ece0891c9fb80ecc91906f56ea7c26f8ec5a55d79b09709733d545. 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/DEVY82000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3362e54c85b72ff37f5ac338b6ee51fc84eb90ba7eb7f32a89ff5e25f9f9de. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/DEVY82000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd829382ba1c616188f181a8a2051e3c2086f1cf56de2e81f26125a195cdd990e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEVY82000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ebd144589b938bbfc0dc00d1ca0561a30762138d3c64d2e008c6e33d6a201. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEVY82000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b338f9c7eff95be3a8f007ed0be19d70a2f9f062792ef253f822844ab36ccb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEVY82000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244864bf19dccf97254b74b567810b4fbd3212152dc3f1cae66a05b75c7a393e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEVY82000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45595523e0249e74a37088c807b3d6c899e83e9b559e294b69cbc224cb7e2502. 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/DEVY82000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57083eaec737da4f331504647a7b32204172fcc3233c52372909093b63bc55c0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEVY81900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881c883a96cbd05fd0bae3fa9e3bd94c33c2995c1323895eaeca248062c66e3e. 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/DEVY82000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e73579eefca27e09e2eb81b4392794ab453fb83a820dd565f2ed432856b86. 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/DEVY82000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a338a0ee46d5ef7718ad3cdff14bebe931d5348e40d1676c9eef804d5d506f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DEVY82400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351b85f7ae845359c90ea83f03edd8d97cc294d31b63d6826f7d5918c8feb09c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEVY82400363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115e43f0afc6a9c51f76b08fbc10c792272db01f795d77763ba209cfe13acc05. 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/DEVY82400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57022deeb799648b83760166c861e84d0283f1df759bccf405ee973c6874ec26. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCACA1452500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2014b062c29671c469cf858ac3037c14c233248f4614ccf770421281d58f7bd0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEBN22000011.