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 0x355badfee264a3aa8cddc9841a6e7ec96b9d4586dea9fd24a2680ee029f57cc8. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c44e8ea9-1298-4988-8c47-d4fb0ef0e2f4.json and https://artists.proofprofile.net/proofs/artist/c44e8ea9-1298-4988-8c47-d4fb0ef0e2f4.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 0xb81b8ce124636c6eabb01b1cd3d8ddc44c5a2967380921ad7cfa5fe668ee1bf3. 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/QZNJZ2374626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7daf32ef7cd3cf599c04e4bc0a5b49a752227373b323174a8a409a51f968a2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNJX2431069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbf51b13f372962a8b7bda9a9bf680626c6c8a4abeefc0d32eca64f0d0d7c87. 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/QZTVM2402795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1cd84ebff8539124457e8bc2c116591d1aa0c07893568dcd022f55c669c06. 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/QZTVM2402793.
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 0x176a4dc0db7bdb4195e007d536ed239cf21792ecc6ec2099ec64939743de273b. 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/QZNJX2203778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed530c850ae245cd9a196a0b815d22d51123a127cdc9b51fe9aefcb0b9c175c. 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/QZNJX2203779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8234893e31a6d25e20cf99c5abd3d0c1efd0846e5bef4464577aaf220b2373d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNJX2203776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32735e9aeb078de2aa0f7a183bec5de42b1878947099543b8fbc7fad59d39fa7. 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/QZNJX2203777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb6f3ca3cf1aabf843632e05cc708f33876dc26d89d610c8d573b4e6544091. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJX2203781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8bbae504bcd1f21f1b938529be7480b9732c25209020359d90d96036d5f3fd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZNJX2203782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78842a445e0eab468a7e8ccd09e268a095e98ca97a1fde5735e2bcbe972d393f. 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/QZNJX2203785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce757b2b8e7b892da1a287c6c07813951f565edfb746dd8f4edeb6d9501d7b0d. 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/QZNJZ2221708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283097b1e6fc5c2dec0426c70d0bb49a0490a7138f5b41c8938d442dbd5e069. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6MZ2168818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f906b13949204f6a309866eb54dc0aa79ee4e96a0164e024f3ec36bfd6976a. 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/QM6MZ2168843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd5a159d4d993ab4b2ba5b7497bdbb0fc21e7e6733500dfa087a8ec3c43d26. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6MZ2168822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81af763d7b9b24ee1b405d57ac30c49397fdf5b754d50ddc91b26531f77da02b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:24:43Z), 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/QM6MZ2168823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e69d4a631e3ad8428a8b57a9488927ddef0e456a731720b7121132be28365. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6MZ2168824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c4ddd6e0cd3bdf5fe94d8c748bb35cd920b6308bcb16e87ad49c57c5fda3f. 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/QM6MZ2168825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896e3cf2febe8b4c9c303b987ad72e3c4a834302c2c3363bb0723e929ca7c63. 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/QM6MZ2168826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922ca2501b0d873312b315dab56ad3acff35c1adeb5ce1e45e114db0c28735c. 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/QM6MZ2168827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65591628d2dbdb0bf06453ba0a78de099c2e16cffde501a39969a09857b8b0c1. 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/QM6MZ2168829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c6979b7ea645a4591a08c16691807b2dae6e7a44dec9cbb40ed969de890153. 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/QM6MZ2168830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d66a82af474fc9173ebdc457e368da5554a0685890a33390e384461e22c35. 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/QM6MZ2168832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc950871903682f2b4b164e065248a0a99aba5fab9ea04ac1b42f6de5ea50efe. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6MZ2168833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a6ca3a09600ddcfc299ebaff72f773395bd7d962bc78e1e8ff6333dd6dcfd4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6MZ2168835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aab6f1f2272e423b481cf6b182ae6b0ecf7f2362ff280f97fe8188ddf2cb98. 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/QM6MZ2168839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a7eb8c872540e42ba18178500a30c76db2b1e9bf878f6b7232b821f7092315. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2168840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ce6d6e8931750007c82b777a91d7811bc10e67b0e90ee3931c1fc810d9c4d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM6MZ2168837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760091c869680f9c44781df8ced2845ab41bc8fc1c29f01faf8877d3fc638f37. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4Q1915346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce2a30e2a428cb43b1b94e40d4de107356d6c45ab97012480491e4dac553da6. 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/AEA0Q2037271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd22cd6dac556815510a09e83c9261e7d438c44a61ae0a3b2af8356527efe807. 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/SE62M2161840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f192a6d257ea2832559199a6495c23c16fa17a770dc6552dd82cd076830acbe. 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/SE62M2161842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d818caa5509635bd6ea6025e68acd0cd03871e2ed2af05c6356f3de57080a01. 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/QZZ972460217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed4087722f0a73e438db014b795cc1e0a3ef5758c816ba76c24ec251aa59c3. 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/SE6XY2379961.