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 0x417a21f1ca974b2457380f2932d681bbd862693bd5c5a1d353f3d2b35bedde74. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55b723d6-d6f7-4000-936c-061e14174d1b.json and https://artists.proofprofile.net/proofs/artist/55b723d6-d6f7-4000-936c-061e14174d1b.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 0xefd41d14b688fe2e2b347c368f4b1f7fba26ad3dbc93befbddf7084246743324. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFW2467749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a497e56d4ec28d3c7e43acef6c6ccfcba564fa21a144ad0fa9026e16011593. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7V2439324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc7f6c04bd62ebc1b0575a0b963d0c310a24d2a3d22d51fb63a8f181975d243. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/QZZ7V2439323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c5c7473f078d72549540334a5fd54b66b94f2f12acc3f687ba2ad1d5b326e. 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/QZDA52512080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ebbf19631f19aada641880fab9b95149e20e4f01b8221aa3e58b567cc28c1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA52512081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f101c75b4d5c0b0d08ccb496e0c6bb67d167aae915a84e8a271c01eabf24cb. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZDA52512082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f928a7ec25b9559e738f192d3914b6adc438b1515b5bb3280856d0cdebe16a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA52514593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de9908f81535518a9205742e0837cdfa20b7c506c91ef78a08812bd9371f48b. 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/QZDA52514594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb1625a41d814ada908d9c0325a323e0879d034b94902bef3035784242373d. 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/QZDA52514595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8090c9b5b6d13beb0aed280a0156b294948bac9bac901ad13448e5af6cea01d. 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/QZMEN2528850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceb872a0d8dd50c442030e6e44b1d23f16315450d8a77f1ceebca648f70e335. 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/QZMEN2528851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749e6eacb82cb740a91acd86c795b233735c430896ce49c289f85732478da1f4. 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/QZMEN2528852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3b29d63fdd682c72290237c67c7813d4d5b91ae616d9f171b16fb0aba4f1f6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMEN2528853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd077eebd2dc527426542f877a7c832ca2d503ffdee7235e052db063883b7bbe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2557507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825bead503bdb8369652ce8e27178d779b9daf1776914a59619e158c2ab6135. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/UKZGC2504538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31878bdc727b3487d31017bf3ee398e2d45920133b844ff1f9d85d4af4e7e519. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKZGC2504540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500dd48056a68111d96ee4bc52b652e1c5075628e6749146b01b1472bacedb7. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/UKZGC2504792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e626f5134651f8e7013fd81a38d152fdfbd485a283c66c9f462367a3dad8ec. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/UKZGC2504794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b7a447339a995a68b12fc4adb78770098c5e44e847b6b1deec7f8ee7fceba. 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/UKZGC2504795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d25fde518801e1555a446b3e5fe33fa8b9bf3d06ba39630ead05381c214b8. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/UKZGC2504735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba49129dded4b1c37edb3f30f487bf69a67b8f89679dc1812aaadb00445b46e. 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/UKZGC2504840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cb70a687e1cf9657e41a14706bf3db42ad1223ce1dbec2f5978769348ef8b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UKZGC2505058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469a8a3195b6dad7248386d3bbd6641149f0545702763ee4c370ce09ce347903. 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/AEA3A2149456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a0abafb5c301f93a9f26be311aae5ce864b135ea8e20ed76cd8c5ddd1f9d32. 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/UKZGC2506239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae14c67658a4d12a37b6030e6928a378f48b00cd78ffa8282bc655b23849569. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/UKZGC2506236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a7925a98407beaba752f15d7ebc8cc27b5c528eb98fd314e306bd007721697. 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/UKZGC2507768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6cbc342a907147bb9720c6b23be4d320ab0f5fe84c07f15e1b718ba8a299fc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT5M22553010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d6d27f72343c28b84c4c1cee5b239a2f72b00e36fd306976c94f5b7a29966. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKZGC2508410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebca79eac169f4c534dd2fde0df21d5fe551f86806377f4a09385df5ca3f8efe. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/UKZGC2508413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00c1d48459b66e7fbab52742cf874c5ca25e643632fdc03326aa642ddc0bb3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZGC2508674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3cee78775bfdab6ecba57a0c4f46e036825be1b57db97230160284689657ea. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/UKZGC2509253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc718af207d7efc1b73014dec0c52f4a25bad34154d4c282d8eac4dd0a5b4e361. 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/QT5M32527088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d8781d62426432dae60e3aa8bc3f48e47fe96cd07d768e645c13d9aa69b925. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UKZGC2509304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf6cd36dffe8fe4fa2ff046ae73647bb872dceab48afa29a9752cab4b1eeab. 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/GBLV62407974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc29d217b9037f408c9b0913022981dab6c26c073e45799b8ddc900bca28cb1b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBLV62407975.