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 0xef93eb9131a4687be31cf9408449c3444c6fee11e472a33615ea50d64f65c16f. 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/bf098f27-c59f-4e99-8bde-d35cf25794df.json and https://artists.proofprofile.net/proofs/artist/bf098f27-c59f-4e99-8bde-d35cf25794df.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 0x93b9ca9b973321a089586c20f5b0b39196c4ddf17d3f49597d2051f78b7245a7. 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/HKG732293282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093127789c48bedcd1c14dcf51df79d69fce425c40b19f3125495621b5852aca. 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/HKG732293283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa741e13520a7fe11329edd288c260fb201b22702330d33d0a77f6a17e28e9bf0. 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/HKG732293284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904a654aaccb275928ee76d5111562b360ebdf446c9829eda96965ec06a7278. 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/HKG732293285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3cc5a9f3bae22e087313dc4b48a86ada7cf7ddcd60f16c9a613c378a84dd2e. 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/HKG732293286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8406b6e36149cfeb1ed14ec47a0c1d56080154df62b89141ae1c1e068eca5c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/HKG732293287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d4a9895c0552572cbd4eb956ebc11a09cbfbd2c6495ff892b6d8789ba4045. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732293289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a21ab753a19996f6c71f313295e3b22a4e6f5beb91d1b5ed4ed81bff755a12. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HKG732293290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9cf628c41983623497b2d6e7c1f80de659a107223f05d816bdfe78562f1a03. 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/HKG732293291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57676f61210b82dbd22f5dea0bd64f902dce0d168f9dc66776099a4b13dc0a8. 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/HKG732293292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987b3a341291b201e836d318db5952bad27771a97c924578c5d8c2347ec222ea. 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/HKG732293293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ebf97194250f831326b6946d076c075f609c73ea56397ae63536edb50e43f. 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/HKG732158912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a2fe01eb5864e9cbb8084a7ba7c46f96fb594d382dc5f46324c5778564251. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKG732158913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d678eae33951448f06b5f8a04812f5f5be852d9ced493c37601136b2b4b7f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKG732158914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeaa01c71e46e305764ff654e79acb8323024cb6fcef46cc70b286b18f0c6ea. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HKG732158915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca89d253a18382852f6edcb22921cad9799b0dc2e7296323c16ea1df3993534. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKG732158916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7fd6c67f02a93d5af354852502044d37842b77c7d314e14f7b59d33536066. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKG732158917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc9a3efbd0a94fb6dfb1d9cbd18889cd8b0e35e28b22df0e12195218509bb4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG732158918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de73c0c5b4a50aaad393d763d284a3debaf5bc0be73ef9be8ba0196229a84d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/HKG732158919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05567b740b601a0d0463aa9d3f63d2b2e2e4d9c28278279506cbbd6b0568b4ee. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/HKG732158920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907ff5fd9315baa9a6e75a82ecd5160dc18b85f94ad6ed5452e7724afdc10e2e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKG732158921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1740c232577debd9e82c4427ca2d7f956810dcd7713167f7b8efdcb9f45ae6. 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/HKG732158922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcafe7b27a8bf84ee02965648df5a869e533678f82d1a94ded68d6ceb7af20e1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKG732374645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc49cce18337aafb52349b5f088078564571ada787a89a8614f3812580495e. 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/HKG732374646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90c4d5c16a05b10ffeb6d6962551ed5f39438bf18ef133412d3cf9e0999476b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG732374647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58ebd859aecf573b2b1d1003fef55c42ba3906edb38183ce5b72d2ce59f7eab. 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/HKG732374649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57890d079c7ee365fee306f6fa48a56e03e5c45f82dcc108e311d51c5245535. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKG732374650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6adce29a4fa649f0a49157dc070f40ea8e4d7e6c094f165f26507662538821. 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/HKG732374651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f29aa34db094ccfbbc824ca339a20f7904ce2e607b5d91f1d459ace924cd762. 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/HKG732374652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8397f1baa0e96d4b23e549d2a93dd104d316bfac305580e5bc422e28f2f17. 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/HKG732374653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573d515bf5fd4f48c94ef3dd017f0da286edb3549b87f08277d3953739b551c. 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/HKG732374654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fafb1d54ae9332f6544d57a18593a2ef877afe4aea0e748e3d49f1fd9efdb6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HKG732374655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b1a10597e9e66e6271eecfd1b2e8bbe114030350bdd53bbdff052217602869. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWA472085001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55e1bcfe86bd3e89f0b2d4c321e3f79b78b5a48040062d70eef5fed3e8db56. 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/CNA651301072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a727dc0c2c81b1e202941eb98068421bd80ebd7e5015a5308eee2d4db0a986. 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/HKG732374709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef04c10e6bd58cbb03fa51d331f4c737ea2cdd9ac2fac73ceaacb07a01f451. 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/HKG732374710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b324b938df83d2810694bb045bca8cd2e708bfa50fcc6ddf4bca06bd63c89a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731713494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4edd44afa469659cfaea69d2c95b4c5299488eef9ecf6eed4a20523b8706ff. 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/HKG732281548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec02b89b6faf7fceec8a9b586a38406121abc483e099a1741d42828b70ec8b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKG732281552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe3fd66e9b0b13e7daa382490cde24c504400b1e61663a2e40edb64a0a22963. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKG732374648.