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 0x69e938245cdff37281d00170cfb3745592c772afd9fba04d06182f04110e64c5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e59a4bae-7ec2-40e3-95bc-ca433e4caa3b.json and https://artists.proofprofile.net/proofs/artist/e59a4bae-7ec2-40e3-95bc-ca433e4caa3b.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 0x3f0e726285263acdd3bf96735425dec5c4aa69b300684a330a4cfad084148a21. 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/CNZ511800592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41975fd07d3322aef6c57887ac9319faa8cf9a8bdfd913d05fa438972f2af3d. 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/CNZ511800567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808f926dbbdecafac30abb0e39df1b72c254a92f9e60b0285cb938b6e0d5e824. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:14:47Z), 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/CNZ511800555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f55419ea3756df9a982a6139b06638f4334a3fc8e8d719c63c92d74b4bb5dc7. 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/CNZ511800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7ca7af94fc3cc26f5d4ccb14e440154be9a166fd0e60a271ebd9893fc0fc9. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/CNZ511800545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91a25866e9fbf45306cc96f9c27cb7e5d34d5529601149caad8a36788a8dd6b. 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/CNZ511800561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b99b68406a916cda87dfe9add6212b998f77480e9625c0484f5ed4f42c6e1. 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/CNZ512200523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6420365b8218082b6dafda53e6a1c1c2f27c597c839ad51d2a6a3c36de61cc65. 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/CNZ512200513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6843ce2eceaf614f6c24dcbf0ac64b585a93e971e9d81084c27359cd0efe9736. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CNZ512200517.
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 0xb3de3b347edc1f112f4860608413662a05997820b91e6b438dd35bc4c5835997. 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/CNZ512000571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0685ed0d0af1596aa65b2ae73533b4198a3d17897b837f75c3b74e5a5d18bae. 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/CNZ512000572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285f3f63a47aa8b4a3908cf8ec414386c8ba8278406c12124059a0701d80eae. 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/CNZ512000568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d209cd27586fce4cee9e07fc4d9385a39b9d6eae4985df09c35b861b6195141. 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/CNZ512000575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149f75d76a014da2bbf1c48b4e9b6f3e17aff871bccf2f9b51aea4869682c0a7. 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/CNZ512000576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde74a4800b783f15bc1c56338eccf8fd14ef7bbcf186ae141ffc41328e3919. 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/CNZ512000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a6d17aceb99632e3ff09e054b0a9838ef7ad45290e3ac35b82c7721d68a40b. 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/CNZ512000570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfbfe16ea18a3cd17f1fe5e3581dd375e9fe1e45225d5747e932f6057f58aa2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CNZ512000573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f052ed0a807219cbebf5518c692c9c3cb37f3cf8a65495c3e25d9d12d3e1b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CNZ512000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ea04578c80e2f5f57f6ac2d7b92b6ad549c46a7d0c5231d7f0cf31cb3bd09. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CNZ512000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cf2c69b4aad9138e4a41b21e9d727df1e138183eae2822fe9fd8ec717b64be. 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/CNZ511800297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc834d7a60c56318c34281a5081ecb9bbde335ec1b3eda54873ecc4a706b961. 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/CNZ511800298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bcec6f7385b0363238200e00bd566a36d6b4e71d14f3d2533b2a1f984671f9. 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/CNZ511800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9073cd1cd6a21ef80311fd70d76d185914b67fb92623a9045f88ebdaf9227a. 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/CNZ511800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a75040e74de19f02837001096cb49d9c92622383837af3cff20d58e00c0c78. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:09Z), 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/CNZ511800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7eb69bb81067417e1c1cb4a4d4a02e317656312d2a62d6cb77990aeab1d3aa. 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/CNZ511800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33db859090d928c7e4821c4b45c273e86d44cda576c735e4308e55a309f1bb3f. 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/CNZ511800296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9484971cde7de1978c6a1dc2f4f17db6fdb4fcb63aabbc479f0647c5101b49. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CNZ511800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aaecb119e887e9932927d102e8dc8790832dce8d2928f125e93d76941d9c77. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CNZ511800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ad7b0681b52851987077c1a35185351cf9d8d0885aa3c6dff3146c7adf884b. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/CNZ511800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551d6179a47ed1ca934f9f8083ca3ef95fa70cd4c891e92fa5735b4ffc866e7. 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/CNA132401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb3c8786b0435bde3a555ca0ef968c1490a4a7fe0f0d8b0bf132169d0b7b0b. 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/CNA132401768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf782fcc2f92ab568250a32d2bc24ed725dbee060b1c6ec3e8e1f7d4af933046d. 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/CNA132401780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210a097253493ff810a873c4f4b98a48e73926d71dc440e74dad9453b87e497. 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/CNA132401753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bd90b5782da39b2c70638e34dfb722bcd4ed07320b44ce49580163ee3f8018. 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/CNA132401757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b44de3cce2146ec94e726e806d6329dd79fb906b71d56341dbb5a5416e24c9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CNA132401775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74158405a0fbd8d8bb6b55552791ec3826178c1de86eddc48a90581c6c50406. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/CNA132401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dcbea4ba0193f55ff565a840c876d911b057d9634fc89be7e9efecee50cf4. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CNA132401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e903b03c4736d58a84992e4a8f3dfb1fb16b47b1637b848c36b8663ddc45c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CNA132401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8bac8acaf063c0f171f9efce08aa1a5dc986a479ff599d304b8350cd2a294d. 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/CNA132401781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39167bd375746629a9c4f3b21e7daeb4f69b4d779cf2e06b9da145214ec1d1ec. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CNA132401776.