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 0x1d76b616e1b07dbd225bc63b1804a192f0e9a666cb7d6031a186433f68381930. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25479bff-9a4e-4b49-af91-de96e2ccb9c0.json and https://artists.proofprofile.net/proofs/artist/25479bff-9a4e-4b49-af91-de96e2ccb9c0.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 0x6e94cf342ab0aa6c75aeb3ac9a8141abef639fd83b52faebfaf90654f21de90e. 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/USYB31717901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11111f38d509e77032705800bad1fae0f346a19e916e34c16cbf0720ba21e8f5. 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/USYB31717902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb484d455cbd8b50a5373e250fd76a88775c8f7ec8083ccae7df3c438ddb42c9. 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/USYB31717903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aa1f154332f8503444707f70b47d9185ed1cc8a04dfd86c1d28cf28a0cf112. 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/USYB31717904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979466713c2e5adbd42f005ccf78e9543d1baa93b5bb6876cfaabd27c1ab78ee. 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/USYB31717905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0e76ef8cc390228413520748eeb140cff29301c935aabd4a335980bcfc1700. 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/USYB31717907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844e54c2085c01791f29ab4e6a1b7f885d4ad63408b0d7505b363cecd5a1f37. 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/USYB31717909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b51a2c876f475ed773a66246c036b0b174b5bac04e25b780f0cecba115f20f. 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/USYB31717910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c22f32b37f59fc1f33e0ea3793f03022892db8f0c68b63144f48197472b2a4. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USYB31717911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf48f21904f874d3d7de4952692f8c97a45111e19f14cdf71ca9da320a1b34d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USYB31717912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d7c2237784597db88756489db51e87e7ad3189acfd3b58951713c5f7739f2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:47Z), 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/USYB31717908.
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 0x8f3bcc2e2320401e5bc299aa116810ed723d2cb1b0de8c969a1039397d03bbf6. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USYB31717906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11f0da0c6e198c0aaeb673cf1db328aa964324ce0ac42ca8e41470d149d372e. 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/US54H9911722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df4c4034c6acba2e30af99fde511ac5225ee9cf5e1004e13e1b9c6767ccc1a0. 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/US54H9911723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05816614381a8838e82a161c1037636e75dc517341e1af5dbc074def8cd7bac8. 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/US54H9911724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478fbe1826ef647adf139cd4c2a8855a91150d5207ecf842f4b888bbeb64cd06. 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/US54H9911725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa89a6e311d65c43b39a410f3a0ea89f93ff1bfa153a0c0e4f2ce838c36cebf. 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/US54H9911728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79943729668d28190c926fe0016d13e880c179e645bc2234f5d8ed7a53fcd8d6. 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/US54H9911730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1793ada910e827752d968743e6d7b68f3111f2c874167829c57a43f42f557. 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/US54H9911732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411eba6e56c04b41b8aeace94728dde3b09dc60bd2febfa22ef4590f2181177e. 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/US54H9911733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf922966f88aeca3ec3d962dd43272c0e9437eecd5469bf13477762bb9bb3d3c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US54H9911737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f89cded458d8a977164aa06d20eb6ca2e48d3d4bf4853ceb8b121fd35db336. 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/US54H9911740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8748aaa9ef3e428c23fb50670d11d13a343a67cd1f3f7fb720776525832209f1. 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/US54H0011744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183907c90c852252e89047ac12f89d096fa9136c3410a8ea6a3d9c1c6a466b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US54H0011750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd1aa687ace8328cd16b2017723c27a876b813a702aeef43a843d387e38af8. 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/US54H0011754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbc134b6e4befa139f5be4082f089964088c456ef021418ee03bef5d35ad341. 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/US54H0011757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb559058c91848cb559065233445d40d60f22adfd70f27f202a2c9de40f3b2715. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US54H0011762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221364fedea1f83e838c757dc3a5044a3318315188909f1e2246881cb21206b. 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/US54H0011765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dafbe728c1144ad6de03b2e2a967481a69f3025386ad565c10647324d1e642. 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/US54H0112510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504148ad9aa1d999f7b572feedf04b0ab78284f5e850b45b1e74d564a4c92123. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/US54H0112512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d01d0469d206c2e378e4f59179083a768116d49739de5e9102fab212418705. 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/US54H0112524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830d8324dcbe2c183729ad7e1bd693c72bffd9e0e80105f6a8e4ce9536b9803. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEHC79606209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0320ed9c6ad5a8f225dbda5c70831b1cad75327e29ba6de893ccb2abb3ee18. 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/DEHC79606212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaddd99c548d691cf9c4fffc12ce5aded80cf771b8bcd59cb47fccd07f509ea. 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/DEHC79606221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f52f6466ddcdff3434ba2f1f86be2dd14977944f7eb12bd4bc10d592523ed23. 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/DEHC79606223.