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 0xf822b09b49c1ca3c2faa8b9ea7805947fcaca57766b0f99da93d61001dc2ce2a. 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/5406488e-c119-436a-b2da-6655055271a4.json and https://artists.proofprofile.net/proofs/artist/5406488e-c119-436a-b2da-6655055271a4.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 0x5211dc930c1ece25ba943ece9a7cff73928a2670ba156b789f32ec823fbaa68b. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US39N2301880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8aaaf7f72c006ade250101bd4105bec1632e740c8b4e8e4287326fc20f0fea. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/US39N2305579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c992f8bc6b75c5e5fa867659f7be4c22f3af8d3b2dbb5233a2266f3bda32b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US39N2305580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c4391d01d94ee6125417c6ee94db845a46f2736097a600ec4120daeaf0b52. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US39N2305581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fecd4b76a6fb45ee7a4d8e420badf0e0d11c37e7a6b046cb72693da8f74b89. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US39N2305247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2c95c659a7326890e74d240cc89ab33e8652283a684813645ada7fb417468. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/US39N2305582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671b4201ad5713f7ec0a90d3e3bb62358a0b30d9ca6e5a335fedda9725144c10. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:35Z), 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/US39N2300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4047576a222036cf447e5ded44382886a86609cf219e372462d3a976bba271f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHG2390276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e02c181500eb95bb16ef2b8770f763e72220a216e3e6c87485179d61e9c867c. 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/DGA092312146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc5d250883e9d47752bd6278af4ff5ca6471d091f3afecbf75432f66944f43. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITAXQ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea86a463fa2991936dd8d29c22d42b17f7b1f3169782c84747c7fb24b4df74c8. 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/ITAXQ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a14703bef8947c58858f3a056e4004d2a91f857cb6f0b284a55c755a1467f39. 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/ITAXQ2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30caa95f90fdb80a93054467284acb1647b97741c25a93e6b6578f8724b858c6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:33Z), 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/ITAXQ2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dedfe073509d99f165414f009eb10922ae35cd22409de28b45768de0a0d0ed. 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/ITAXQ2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baaa81d98888630e4e42b230eaac8f478b965ae367569e55a485a57f7dd21c7. 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/ITAXQ2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261642ab3c68f58663cd95fb0ea7be31c4a0790f848408297297d8fb88eee6a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ITAXQ2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ec28fb67464b8d104807d2ab51efe023e4ea1026dbbe97856fac86dbbbf3a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:20Z), 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/ITAXQ2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715088d8d8c3542cf7110fdf18816d5158abec0140d31dfd53d8a7bbb72c664. 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/ITAXQ2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf07af8a73ea0f50744839f0b37264d528c79a38ba91dd47c1bd80e2ce4f4487. 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/ITAXQ2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33250ff5fcd82de3cacc3a8e06a9a3e54514e07dd7d0adcb81139064d763c20. 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/IT7SU2110112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8578cc246fd60af78cd2bfc3a3e2580e0966c56a18d4d85dcacec72dbf1aa38d. 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/IT2J82100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a60273cf9b5a30524d7db34154bbe32f270e54b23518095ba55bbd7366a1a. 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/QZNWS2028308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d60b0a32c8b36b35e73237f025357c8e3c2565b5c469feaf1293722f0260002. 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/ITAXQ2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb7c7fc1049c789a2a42ecf6fbbbf7fcf027030e04f0b52a248dffb3f423e0. 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/ITAXQ2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a1160648f927fe1a0e41fb8a8a9bd803535af5f564423f3c3d5ec8dad7751. 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/ITAXQ2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550d11d8e70dec3f5608bd2775633a3cd268bee464223df8b5dacacc4602a89. 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/ITAXQ2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb7c7fc1049c789a2a42ecf6fbbbf7fcf027030e04f0b52a248dffb3f423e0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ITAXQ2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26a1160648f927fe1a0e41fb8a8a9bd803535af5f564423f3c3d5ec8dad7751. 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/ITAXQ2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550d11d8e70dec3f5608bd2775633a3cd268bee464223df8b5dacacc4602a89. 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/ITAXQ2500030.