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 0x27e0ebed93865452252cfc9e982da804ea1e465b84d0f411d3f0024a7b7b690f. 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/0abe204b-7621-41d9-a446-0c2ddc83aac2.json and https://artists.proofprofile.net/proofs/artist/0abe204b-7621-41d9-a446-0c2ddc83aac2.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 0x8189b48ff5dc6a23266708832ad7d2a62b056da6392c4df1e81c79874a1e3b71. 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/QZGWW2130453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dcfb69f2d9e956ce861fca3e385ea041f55c5ecbab695fb444288c5b3a9430. 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/QZFYY2155666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dcff562ded5c378099e7cee2bbc13b39a90d3274a010f84c2179534acef142. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZES82146031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae7ff01ab336ed548257c6a5e55bdeb5e4fefa6ddceea3b50d20814312eac0b. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZES82146032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0511dff96d785546d0b0d3d00d8c46094bb96eaaf5f58e434d06a94313c103. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN52163015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fab8ba5ee62b54516b3826ecb171693544bc48a2a2bd1b1ed1e1c4e2dcd8ec. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N2128185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e8d066258a998c9f1e66f0b5a66ce4e7d8efa7bdcc524e549b41bb5ed4242. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWQ2198085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b87f955dc1817310450ae37718b60d20324c842b009d2017e6281e06d2c1f. 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/QZFZ22278016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa49c701817e1adae6ab310d9faddc086cc9c05060d1ce2cf94cfce3714384d. 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/QZDA82233425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd086c3126b3166327c0f46237277d82c9e16471ba0a5b5378710bed6f9d7f6a0. 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/USANG2203863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d96d2cdc14d1985a6b6fb4d314edfeb2e8be39e8fd486641ccfd76271c826ee. 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/USANG2218827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19cba6d1d108d3112cca0b5d6aa04dd411748c814121d2e867090da3ecdc96b. 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/USANG2218826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193ce13516354bd15435b8a675e87320a6cb3d4f203b42c115735cfb97afad9e. 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/USANG2218830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2da64a110d2b5a36acf8eef0ae105687cdd468d69c807a135a7226ebf1d08d5. 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/USANG2218831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94564b24ce707c91c5b818442e2c6ea7c1820e4b40a233843a0d4d8a4fa1b66d. 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/QZHNC2217377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d27b4478ca8416e53daa7b9db5a0ab4e89af8f33fd8a279b132a078a6da4cbf. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZNWQ2228098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fd47ba3cbe51da7c6b9f4d45982fcecb179ad871df47a9a740f6043b5d224d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USANG2218839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587b796ebb0efc2846b8ce56db85b06fa00428c30046ec162fc89d3f90406527. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USANG2218834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f429dfcb3756476aaaf6cc5e77317e79eb77e94c397e61dec6e762d06e2e8. 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/USANG2221591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89cadeb3f2af282459607804c010f038dcc50840d1d925bbfec48045197bfd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USANG2244959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897c4d5065cf179b93708ce54e2491e21f5f58dd0427dd576c96fe58d63d930. 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/QZHN62332231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674ef9518416cfd1cb69cd0427c23098aeef2662be89b722a33246b092de4e6d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWS2361078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98baa27bfceeca82e5c9984043e90e7a7e1ef44830623e57c3f867e0ccaaa1b3. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZWFR2393410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2945935848fe1f6aca8c6b14f844f8585da9169e725cfea23b0df38807602d. 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/QZHNC2438612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48e3c604b90cc109640d2570aacb923a5ed72fd3f66edee0c2330a241cfd5b2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZMER2459194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c0868961cbbd3de4afdd04287113e36c12c2c9d7235b862e96b5236d8a1fb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWFJ2428134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c4d5bc4fe0a438771af00ea3897fd0435ad68217eed2aa01263fc51f27013d. 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/QMDA62119504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccba2c112a6af0c9453fe55f67bf610560005c14ceab486fe372380952df870. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMHL2353990.