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 0x169519cd644939d9fcfe18da4b6b5ba10d3ce0dd6b9469708cd1de3ba43467d3. 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/c7ff2d14-6f34-42d3-9c4e-2da98db088fd.json and https://artists.proofprofile.net/proofs/artist/c7ff2d14-6f34-42d3-9c4e-2da98db088fd.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 0x6e26a9d38b040e5693f87974d9e934fd34465a6d8bf729fef680a7273177a145. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMEN2108651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad42ea78600b36cc06838abb7775d2683da07f2c0dd41b0333e1c62cb3df8d0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZMEN2108652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b258a099db725654edb2429e83ac51e566d7ab902d363eee9f51f07605e3bc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFZ32318199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe08783c84bdf59e77e80cf8c0a5f125be2eca2928436daa4ebb65840d8a2e3d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEN2340634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe08783c84bdf59e77e80cf8c0a5f125be2eca2928436daa4ebb65840d8a2e3d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEN2340634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6bfdb6d300e117ea55657bd241d47ec7b3047cc9d12780ad085459c7ad7396. 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/QZHN82492743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf880e96d4ead85b3dd6c99d4e02de2a01590c72622e31afcffbe3a9a2da37f67. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22499579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5202acf9fc90ea12b6351b0c01de726e2874765679b70d970cb0a7e565dde16. 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/QZTB62476079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5202acf9fc90ea12b6351b0c01de726e2874765679b70d970cb0a7e565dde16. 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/QZTB62476079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0097a2e156f443e479129789ef5469a8e5d230fabdf9616cc2487b8f4502d8. 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/QZDA62526463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df9e9f2076ab1ec172d2d457e9bd7dc35b3bcbec7a61e456fe0269920fa1050. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYZ2521941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d040613e40ff2b84bf7987ed5bc9f4576d61000afeef20b1cc718d9ba3fbd2. 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/QZFYZ2521942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234cb772ee6b01d5220244d236ff780c37679139618a92b76ae519e99a3e7b6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZFYZ2521943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25ca29ab00ff53ba77dcfebdb3de2ecde786ff4edda6c24a354131348290c5. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZFYZ2521946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af6660e361222d02d7c81dcabd47143dfe023250e76965f79180c528b719d7e. 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/QZFYZ2521949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ec5a0e9270a0522875f2eb427bc2ad3c215644616fe3b5a2e71e163cdc34d. 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/QZES72548305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfd80ee5441bf36969029d6a65c370cb49d9311e13efa14122e98bb185c02a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZHNC2519026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015613b8eeb7f6bd1e629c4b839ae9c22023f1f28a263bf19dff73efdfdcbd91. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHNC2519027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc6eb9517d93468506e08b9188b089dcb0de2a8a6b320266c4bba2df525dbcb. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZHNC2519031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c4281a599adefb3cd033998286481e57ba5780331e82550a6f032828008c5a. 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/QZHNC2519033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d702d3646bb2b949f52da09fd5a8ac2c7571ea8bad0f818e9f5fcfc9c2176e1. 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/QZHNC2519034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88fbe415f079c7e60da8fcfaf5d2eb3d9ff3784863e26d516b5ae3226526d69. 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/QZK6G2563196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da68d192ce6c21355be86333981716d8f4103d694893a40b1914d9cbf31496f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZMER2520047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da68d192ce6c21355be86333981716d8f4103d694893a40b1914d9cbf31496f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZMER2520047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a2b6870f2f709854ed9a0d4688cf57a7dc5a7d58de1101c0366fa574fa84b8. 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/QZNWS2543150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559dca1001597402bd3052e5ec3c09c368e951e85e1fbf013b9ca9e434079110. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWZ2539505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdfcb44d0020bc253b213e3dbb6e1e2a2319b7a6f4d9c8fd94573e288251c6b. 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/QZNWZ2539506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad6c931a4a406a57fc7f8fa7021d3bf7c5b0eb8c6aedf9526e20432b9c0cf1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWZ2539508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42cf8da372c648a5b229e163ca70a9326ac65bdf5c95c5e686e41acbb33d548. 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/QZNWZ2539509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b9d13ca519965c1e30b0206bbfa6c780c51322ed6d8bee18a0a730414f5efc. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWX2583481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d36ac1523b3ce2a13dbfea5c16cf4c46d132472f8748fec09b4766f8a2888. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWX2583482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d70003e0e3c9eed4d4a88a40a3d86d293ebf1447f6518ecae2292c50f5dd405. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWX2583483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3225693249e0de3d63346e3073701086ea4c3932298a8a95b8cc358c3110b407. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNWX2583484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd00e47bd9726dafaf6e76fc95a7d0e353be949c154bbb4c57b9e23733d20297. 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/QZNWX2583485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dd781e96196079b0b1bc635fcdfb68884cda8b59e73ca8e19764f41782f59d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUGBT2534837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b9a794e6ee148d5f13bd3a376b13b9334298cac2ce00cdb1391b76ffa4334. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/AUGBT2539982.