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 0x7ef642c4f4fc5477c8ce0f7acf121b491809afe8b55a785de0ec7b60c0a20231. 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/f8cfa06b-fddf-4984-868c-a7344d1c179a.json and https://artists.proofprofile.net/proofs/artist/f8cfa06b-fddf-4984-868c-a7344d1c179a.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 0xd53a42428d33da980f492b4d04ed4d6db7be5bc0a70a5b0de77e40ba1c65283a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/UKXN22341335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402c113d643d1c471100cbd7895fdb19f1a344c4ad75e60d61e68efa3ff24de. 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/UKXN22341340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6982a6c3d7b94f6f1387888706eefdb259b8eb10e5aa4bfe58a869678a1865b8. 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/UKXN22341342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43acb04008dbfc54469047c49971cc28258a1bd52b1d02f2948f9e650a77b7f6. 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/UKXN22341343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb126fad927907f848631bd60bdf7b645a71c455f933fa15dafc015455cb796. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UKXN22341338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be27360a83c3151a4d8c34bab25d3d27baa504270e197bb5405379e3714c9fe. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/UKXN22341345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ce2404785f66802dc47015f83ca4487d55c2bee292d9f0ea240f09d8dc4c5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UKXN22341344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0674314a8ae392617647435299ee533cbb0522c5e0c7e319e1d524213f434. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22341331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6cfc3e9a137d0ae24e073b5542a22d8dad79a5824d77e7a261d63afcd146fe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22341334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406616fd04d64c7f2326b6fd01b5d22e3d319f915b9bc60e09b34321d2e442f2. 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/UKXN22341337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914757ac4b2fbfab56dfe05579f8f324efcd9a949ba6092ab6a716697d9a8ddb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22341341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369a35c78f2c11a834d38e1eee624272ca23698a6df87231864d5eb0b285247b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/UKXN22341333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8033e7e1a481da6ccf04684c3864101166c77e9ce6d9b3c1b2f5853d25e9a8d4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/UKXN22341339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a278d23f5b4aa59ae50a789c309f465d6764ea53316c69698212361ef0c7bab. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22341336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53884752c181776770fd478d6a26c01a4454e99070704e874037c964820df7d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKXN22341332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed14f6ce52ff4f74974393ccc6bbdd2b9a4e1f9d873683d95b5d121dc7d147f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UKXN22342412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24096af5860879e8f8f18498e496171ca26737f81ce184900cdc3853417ea7e3. 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/UKXN22342413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d00beb3ff4a44bfe6967ef0dc067941021f4513533c67b575fb928ac6f0a3bb. 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/UKXN22342414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5ce8ca15e4c25141aceb06f7d9edde787d6a7f5a837d29165f300c316e218e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UKXN22342415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039136ef71975eb551ca0638baee21835ea19fda09d66a6d164be644651dcd3e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/UKXN22342416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eb16eed116cd74382fe986a36810d160271b995be82193922ab75dd199e91c. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/UKXN22342417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b5c42cb0f1e2ec87ca6b26790f5f80547499bde558a56c481544b58cb6b3d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UKXN22342418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf3334f1a2e9806847cba09cfd7cb65061f5c0ad99a980e215d8e48a63a4106. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/UKXN22342419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21643d2369f212128c874b41022345d0c40381d90f7a0b3e39b76955d159a887. 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/UKXN22342420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de277fc9e97a534671cc702046756d3875dfaeb7400bc0a1c743f79d1f24096. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKXN22342421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf681993c3ff17cc561d312f3d6ff25fd44305474afcae9d2c4145fdfb28f90f8. 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/UKXN22342422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e81bf229d415727c08333905713949b10cc6140618dd41a8eba69a6cbfe229. 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/UKXN22342423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d1feb71c9bdf22d53bcf2761bedc9d45597b228cfcf7890ee4965d8388792a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKXN22342424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5898718411e1c00c548fc79b53ed35c07fccaefa0836061efb844bef5ea74edb. 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/UKXN22342425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995e2cad3784a68ec48c42d851977504cedc029fb113bc6fcdb4b48146685759. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UKXN22342426.