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 0x60bfcebf549cc37d4ff012682b494021c271559a3a074d1fe0a9c6adb71ee781. 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/409f4b47-1e87-450d-919a-d6004f95c2ba.json and https://artists.proofprofile.net/proofs/artist/409f4b47-1e87-450d-919a-d6004f95c2ba.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 0xb572b7cd76cf1145a3e3d69763bbeb19b184044f79e21a0b6381fb6adee16377. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMER2375430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba5e443721d52385d5fb4df8c0d1625238df88617d2f7c21788b1cff8a137e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN31907634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410dca3e75f2eac1feaf31b76f72597d368d4745ebf1a1288ff1cfdbb5dcfb6d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA1950172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac8abf6524cf0bb786b09bf22c28c43c9a582cef1e73c38113adbeddae672bb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN31949261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c21ad03c6f65daf5e63b2e9467e0f63e2aefa57c8855828aa10ea8da2a2066. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN31949263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a0afd989cdf8f13d4e1a75996bc200ce60e6616e8287452aab4fcbd410d73a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZHN31949264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52edfe07395698ab9bbaae10f27b906c0e2335730bff40b64e3c799bbf5a07a6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN31949278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df72bfab8ca726e967b7c9adba2df5271d746816f107172e4138ccf148e964e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN31949281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8bfb0ef34007e707a518e1ea1076df32b3e44189761457b87a4b6fe23d1050. 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/QZHN31949267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410dca3e75f2eac1feaf31b76f72597d368d4745ebf1a1288ff1cfdbb5dcfb6d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNA1950172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a889beea3337f475111bbb8a90caed634c4f0c728a9edc867ec95bb85c64546. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZHN91984896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db2b9d8641875a8680a61baf8db279fb1cee69984b95105c678b9a845cdfbd. 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/QZHN31910363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce24b9c2a57fad645136ac8f126e0d40bce9f88a1bb27b67ed1f3e2a4ef5fc32. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZHN61997684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8470b6f9a71685d2613766d93d642f8d61640191eacc0a8cc2beeab10f9397c. 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/QZHN61996073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef4c496cfa1e0324c31c194e3394ae3553d288ca354ed888d5a973af06c556. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZHN61996077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5cd76b2525adc6d20cd5743bb0b07ee54048318da0b65a890c8fc18efe42c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6N1957810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109c3c87e2a2ee7133422b63262189f4842e9dbb48afdd6591bdc3bac489fa2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZK6N1923565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109c3c87e2a2ee7133422b63262189f4842e9dbb48afdd6591bdc3bac489fa2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZK6N1923565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19e3bc634a24334f8b76c68c89e4e9e031b700e8440f1b078f71980d719673f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZDA42020727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9a3a9fef1c5a0b387a689bc08a0f9c3b5745b7244f73197c258ebff2f8683e. 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/QZFZ52098732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee06fef19a8ecf06a1306a681b469fc1f8abcfd17dfc41644d90846eb81c4d1e. 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/QZFZ52098723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edec7dde12977061213f58fe7838f3717ca116dab4f20febbfc3395fb9c7b82. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN92048480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb11a4ad9e8f18cb12e6d534fc4b419bfac090750453a72a64013fb79d69b787. 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/TRA162100645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ca7793dc9078be0f45f63725ad639265d153f010a2a42312e68a5b43edd58. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TRA162100685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd93b22275cef607a801ec5904bd60e492ea70ff7024cc1da850d55d1662e8b. 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/TRA162200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde175fe7448eabba2e73152fd72f2c70f8da77be296b29ec82f3efa91a31bc0f. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/TRA162200459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355bce3cd845dc3688ad0ccae84438a0e42e0b5244a83bd23d218ad16258748. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYX2444433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5393a442554c90191d3e2614691b339115abc05e530693bb688f558f0de25b05. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DGA0L2454653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c8c940dd5d35e878c15841506e99ad4ee6c1672975651442714329f57c4ebd. 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/QZZ8A2542881.