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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 0x493fed6aa3fe55d4ebf55ed1a72aac056c6528b0eeb80e37ef3295548c9c0a3e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75d4b795-1510-42c3-a65f-d9e414a4de1f.json and https://artists.proofprofile.net/proofs/artist/75d4b795-1510-42c3-a65f-d9e414a4de1f.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 0x5f647bd6d50101c5f647a8287b59bdd5ec02a5f5fbb6ce81f0291fda2d234fc6. 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/SEXHQ9701101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0366741b85404f2d1c16fccc5c634e64f5c0d18542dbc2b75d8410562c93f1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/SEXHQ9701102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016a7117809cda2bb45a74c2a71f0a204a982e2100eeebcb6caa00b32ea6cc3. 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/SEXHQ9701103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c20c97b8bc724b4d08c294072d1a74beb29478d1f6957b0dfb483652c4d11. 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/SEXHQ9701104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995df1f5178fe1ed78dd8f090a9275ea7f6f372913d6f199132021f919b9358. 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/SEXHQ9701105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204f1da51646a56f7d390fdf4843ca66eef8553356ed39f8976c9a026e2c468. 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/SEXHQ9701106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cccde828deb0997d3e6b1b3fb804927bb8136f019a173eb993c2b67dee907c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEXHQ9701107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92267bfb0edfdf51e7a6480bde53100edb3cd69f887a6d7206d8a30a47da36e5. 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/SEXHQ9701108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb239852c8697b77ae8b772216ce3dc4d474c698fb5232560de2796011ae0197a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEXHQ9600401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3732eeb2e4f117603ef3fcdc8b8f9603da8eea59b3e02e8925abb9dd289db1. 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/SEXHQ9600402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223bdef4c5594865c00711a1fcaf50ba3c477637044429a8c640596d788aec51. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEXHQ9600403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2d4c134adf7a4f9de1e5bccaee765691fb190722d52776308b21924d92c12c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SEXHQ9600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada738917a795bf302ff163ab39c591f0cfbd072a75311e9f953d1b75586c6b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/SEXHQ9600405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb3fc91c0235cad44c9e91e73e290c007375429d40216679ab63b74abeed76. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEXHQ9600406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0941257a30ce58064a64bff8d963a2bc1ef7071d08b1fabf634d2b2c098d05. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GXBDT2392238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c210d39ccb511217efaf5a13ed4c30a893668cbc4e8cec73b7e155ddc9935b. 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/GXBDT2336925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4f6c89620f855ccc746857be8442f1602cf96cc9288b7055c684d03fb1a773. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GXBDT2332062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b2053914ca585706dc2546b6cf2637040f3a915e0b74b1240f817503766ee0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GXBDT2352094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131a0e9c4a1573f17bc45eefde2cd68054962fc60f54f3367b837ff251a82571. 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/GXBDT2319655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f87b3e0c29bed1078eea8096d1b8579ba24488cbc73270e7b1b28b82e7a46a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GXBDT2383733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5aa2fffab21cf2a9970c5de9c27102074fbc7d129688eb35d861b596b9cc1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GXBDT2382972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8216aa15415f982e0f9252c48ee72de44c6c9cee2ea228c1eafe7015c274bd6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GXBDT2316481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a783e4c70696d0c37edd5e537f2aaea9b501c0ffe1f166147ca0c671cf3b46. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GXBDT2312376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb531e873e5feb216e77d3d59bf1a500c38cc385a3e1273ba6d21220359e94183. 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/GX4R52308579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f0e0c49059b6b7ba89d8bca9ef8b1cb09d8d0539e8d444341798e31c215804. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX4R52355215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac9d14483666025306ccccf4581f583645fc027ecea8de6fd9961bdd713f46b. 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/GX4R52372894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03dbe938102f709da3b0042c62b06b16ddc90c0f3ed97f2cbd531412753a519. 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/GX4R52385931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11eb380a5315a106e3523e0e2fcbdbeed0e857d774db2023bb78f04832e30b3. 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/GX4R52353078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582aa434c71a03d95698354f784924e9ca8728e2c336d9082d98311e61a6b9e4. 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/GX4R52384306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626c7742372e93f869fda37393b723ad801d4a0eaadc6ff5334c67081a5634bb. 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/GX4R52310560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81420ed11c6d09c76a9997c4ac05e7e4082618cbf52e71df5cf3452e3f92203. 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/GX4R52370345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f19386e52d92459242f80b708d06fb4ba8192803ca126bced35b25bc200af29. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX4R52336240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55f2fb92e9ffa5872b860cce6e1bb05b45314d2b99a600f749dd54ab45cc6f5. 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/GX4R52369769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddced792991fbc9fe3a0b7c329adc0b3d665690e2d910d92c8f51ac76134a15a. 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/GX4R52391423.