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 0xb593e2c8fca64f3af686658a6c498a0062d7607246fd07174b1863b9d05b366e. 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/c702ae32-f8d6-4184-bb8c-20a53df90d3e.json and https://artists.proofprofile.net/proofs/artist/c702ae32-f8d6-4184-bb8c-20a53df90d3e.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 0x956b2ffa2960a219f0fd6d6c1d22208ecdac6d6e65df63a69ceb4876c025e5f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEG1984239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8f0fce7b83d0e01564ee782ddcede10aff74f64e6d13609e7ef4fa242541e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEG1984266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2129756e0c01e2d2384980931cd58dd758a76dc9399bf8d3f9701b9eac65aefb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEM1948870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda64f38fe34b52bd73b0dcbb2f241ba6eed983d82457067a514471612dec1bb5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAEO1910758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58abea34111e1ebd9eed37487f82f29bc1ed1130c8e4b8fc7a0e85ef9081da65. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES72039146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5cc7eea37c303b51f7757de495b8f480cba50be536a88039514e3353d81b05. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZES92056654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f028508a810a56e25c4b8beb1670a7775a31fcc3a9b2de661450c177fc19211. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GBDHC2019003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd040b4cb9f9cdd2b033b0dea3f2ace8b1ba5f4c2239ab29dfca28168f1304f24. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBDHC2019004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb816859355a2e28b813587cee258d305fb71c10c620bbc268c9b67330666b4d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBDHC2019005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b7335fb05e406290c40091b13e73079c4d3215f148d8c31ba7e33844377783. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/GBDHC2019010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d95800feea24cf83ed2f92a9c12a6983d24fc300f89b4f243bed831c8c86e9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QMDA62186799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a465e77dbdc15e54a432bb8b6b6a5d002189150e84aece38ab9a4c0bf901c5. 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/QM4TW2234098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f1627f0d4c405619ec05279a2f085c219ed7e28ba3f0c3168f0cdfedb6d111. 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/QM6MZ2211279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff054b01c644c9d216a978fced200a7cd666c1f4d3ddbecbf091e9e98ba3f26a. 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/QMFME2201627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ae96da24039e1272418b3c8e6b04087b6994724d93cb333a95d7c91ff0b65. 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/QMFME2201628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c8f559e800e41cc47972a1bbf7d2b0308e06713b6f3907e35059a089ee65b1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA62289927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a465e77dbdc15e54a432bb8b6b6a5d002189150e84aece38ab9a4c0bf901c5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW2234098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd6d313e2b0a0a01de48e8d153ebc2724c92a009998197610a244f1d5910305. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6P42215587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9492ab6a4bdac4b3b8a391df1bd5f1f5c3ab1dd777972cc9320cd89b94e4bcfc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM4TW2446542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8a8fd558e0a4511d119e3679dc39c750352c66dee735bf142890294ab0e0a1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM4TW2446536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae6ba64511c6035d85912cdec1ea540569a006a7095a854972674c69b50eddd. 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/QM4TW2446539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c481f9643f4df1eeb3d78536a6541a1791eca1a5b5ca722fad2d0eb822fe57. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QM4TW2446538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae6ba64511c6035d85912cdec1ea540569a006a7095a854972674c69b50eddd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2446539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a7f854f1c1542be44006e4e2c75a73ff4054a01bc8335579e2dc38088a70c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TW2446540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee32d005ff8f380d7171a350c5026bc9d240c43885fbe18e901b8ae73eda99b. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QM4TW2446541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9492ab6a4bdac4b3b8a391df1bd5f1f5c3ab1dd777972cc9320cd89b94e4bcfc. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QM4TW2446542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c394309d1248a6c9760155abd38ea919f986bae406b25dad273a2314586675. 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/QM4TW2446543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadbefe6d563525372b2b5ff369752a9cc0363a23a0bf29287fd644557c9e160. 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/QM4TW2446544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8661043899a80755b6632530f2b3a60757ad9780776b15ca70dd6540d1628586. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM4TW2446545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a5835073c287d03358193161d4f7a89a683e8f0dee55ad4e9f6a051423aa87. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM4TW2446547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665d25c90bfbf6f3f0954b30dd7b34add5189cf3d2516d5104cf8a7c35a443c. 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/QZTAU2270145.