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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 0xe7337e0f5d1952996942569652fdd49fe616d5ca612fbc3a8c69950784620eb4. 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/6c8d81d6-d401-4e55-b6c2-7e6710b1e2a1.json and https://artists.proofprofile.net/proofs/artist/6c8d81d6-d401-4e55-b6c2-7e6710b1e2a1.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 0x76d439c900092cbf831dcbfbf9056c7c077746321a34ba2abdd3418c6e1355c2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SEVVF0501401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9f096b2f9bebff412869d7150ae18624a34fccfd61876e818a0ebef432cd55. 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/SEVVF0501402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68b142303e33a07b7c1ad61eb2c5411630b125245827fe6b4575607e6cbe92. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEVVF0501404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b27090cae502ad3ac98fc87df1f5d67c75860ce0f18526f162b6efbb3f76532. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SEVVF0501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44735c556c4d2a0183a3f441f07de62a92e37f8e4695a19389071012ae5677f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEVVF0804601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f26928dbb83336b3f018bd403879b216998ac227608452c7a4d73c4a27274b. 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/SEVVF0804604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44735c556c4d2a0183a3f441f07de62a92e37f8e4695a19389071012ae5677f5. 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/SEVVF0804601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a6c218d6d11a1df2858ade2b1f4546ef2f73294e72b7e19f710ab9c84ca273. 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/SEVVF0804602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f26928dbb83336b3f018bd403879b216998ac227608452c7a4d73c4a27274b. 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/SEVVF0804604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ed6a81de3c9dd4c47897872251b74a5a157a05d6c0f1b50a2504da7c5ab1d6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SEVVF0804605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d916be1bfa81398b429e6db59da12e938812cc788134b8e860a4c6dc588bcaf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEVVF0804610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964cf238d4ae1d85e5011969a60533cd6d47925aa377ed6766b7935ebbae4fe8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/SEVVF1003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83060819aae76246df029e8c9bba82243469364e401d03373466d4beb98e4065. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SEVVF1003702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7157ebdbe12470be5fc5a192e27c0812dd3d8939dff182c396aac52010c965c. 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/SEVVF1003708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b51583b6229aaec10a199ea47e4abbfa820c27a6c1ff5bf1a156abeb597f5a0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SEVVF1003709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201dd95b55745de1e7d5e89533efe18f9677ab2cc1e48680cfdaa9892e13bae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DED831200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecca231a7fcf52552e32fa19f15b2485bda8c9041ba2c2b43aeb5e065ea9067. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/DED831200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12c899ea67eb47c687d757225dfd86b95479d22cdb8984c22a5adf60e34c8f3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DED831200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4701463470c3f3b2ed32e4db328b2371c878f7280aec582c5f5d7d5dd2d18914. 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/DED831200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a11e5ec80ab76a897e47d40fabed9e396dad036ad22f9ed311fa17a2bf6c2b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DED831200269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6329c3cea217597c331d86c500b5411180a3a09c65bd35add9037af06f01eb1c. 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/DED831400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c640b7bac626f1d7a7e99c905ad1e1aab6b2935d7a8cd643a8371b37a4980a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DED831400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446ed5090385d313ef4e60d73954452658a67caad20626afd8e880b8e0f31938. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/DED831400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e72d0644cabbb8f6b90c70ab96725aef2f2bb76d719455de40ff6cd5a2a8a0. 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/DED831400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff7bd894f4cf43297bea3e3b3b02d963827c911bce6e42305c051f33e7634f. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/DEA451800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1143d56b0d9e1688b12e721d055090fb43b2b02d0e4a43baf0254f889a26adae. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEA451800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fa3f0d5da386c8d8a8dfcba5175c5b939d078aecc4ddfc590eedd368591a94. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEA451800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728a26b099d203e85d333fbebde633128bcd93219450d8a18965dd8eec67b5b. 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/DEA451800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45b66060008eb86cf7107feb60476ae8ff1ec67d8ac0bfcc3cc6f6ae794d321. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/DEA451800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c678bc893f540af6031034072c560779706e2ca2b46d7671a3cfe3a626d86c2. 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/DEA451800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d69f11836e1af3e4e11ade191fb7a3fc810ca1cc4abd47b8a210d7fc2274bbd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEA451800120.