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 0x4585e20302068093cee76dcdfaba90f7e34091fae879786aa27edd7f60287ec8. 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/bcf2a16e-f095-4b6a-8cde-ab8e5c5a474e.json and https://artists.proofprofile.net/proofs/artist/bcf2a16e-f095-4b6a-8cde-ab8e5c5a474e.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 0x88e72aa42dd95ecf789b49b7e841275ffec909d68607fcda0896bd2c4f088726. 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/FR59R1999587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bbcc093e1b790a21d5cf65824e648000ed47b04007e9cb4ec837a190b354fc. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/TCAER2054145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bacc2e84b30ab95248ae177cbd7e02a97f7e4b8e83b578b1f5b8541bf244fb. 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/TCAER2054148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ed2c0e2260e8974d2e64efdc629dbedebf4d293ef1e39d9e78a69f2203bb5b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAER2054149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261f3ef6331f68eee7760a91665f91c30248e01c1df747c4e5a4a068ae423f2. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:28:01Z), 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/TCAER2054151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17960f5f54169251567c7b0cd8dc28f55701ede0f22113e998446485a7297bf. 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/TCAER2054152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb593a062997224e49ef433c526710b616e6b9736317f42c7865bfa775708917. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAER2054153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8f9b70d28115c1eb28c8d1f625dabfaad29f77132c9b0aa9368cdad7b6a90. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAER2054154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f8e017dea916e0f572bd830b09ace8eb14cdbef90e0ade7d057ebfe6c2cf6b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAER2054155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca937e551c8cdf4df47d4c86aa32e10ef57761670ea06be74854e6e0fb44ee26. 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/TCAER2054158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa135af3026f466f521c1d7264ff1d00db3fce833e52d6a07894f191f28f2526f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:08Z), 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/TCAER2054159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc293b5b18ee0b083007399bf1adf5a52b536d8193aef6d64e399b7ee41e9f553. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:44Z), 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/TCAER2054161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5254f84aa7a0b0a8b73a4b342f9a4e0d9d691771cc873988b89829196d7f71. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAER2054165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad535b641a986c8e2bce432f42b277b7ba411da9da957590e93fddaac7c50f4. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCAER2054166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea730a515b6ac08fc21ee89c8a6cdd41db4cac5762be45ee3526c1c148cdf5. 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/TCAER2054167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc568730b20b0907a922b30c041611838b601ea8ce6ef60c335c423b1bd180685. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:04:59Z), 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/TCAER2054169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659bcd3008efbab93bc6e9f01c8c1c9299220a118091d1560a7ac85e865befbd. 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/TCAER2054170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a1242ca3c34ee7e41bdd355d7c2276a20ee355d39564197f1386f8dbc10ba. 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/TCAER2054171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51556e62588063c59aa89431cbc3f8bfcb97fa828761bb507f2dca713c40e2b1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAER2054172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd462b2851574558725cf272dc90a89dd20b62a408f563e30850590f8de9d016a. 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/TCAER2054173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7588912307b41b6641f7f93589bce652d1d1621cb068f5b1d61c527dc7c317cd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAER2054174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d967f8490d77480cde15e1931a0912405e4ca97d7c1c31eabf5b24d1409e7. 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/TCAER2054175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01739667feb6bdf392e7df92d65fdb76f8a86c420eeb5562aae51894237f6b0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:36Z), 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/TCAER2054177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703188fb28f01f27a841afe0278aa01bad719f406ccee5040e4dd87e650417d2. 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/TCAER2054178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee14334b872318432a2640726d2ac622f989876ad64c91a45e3423a9d1bdaa28. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAER2054179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ff498b21a75063fb2bc6b6ddf681dc6a6742ced91cda6dfe322b1ced1e569. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:59:08Z), 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/TCAER2054182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e492c0d352d130aaf02a1216203b95b2e63a07e19a22dfb597841f93563806. 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/TCAER2054185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb84de6213eacd45453fc7c8e2e171f05e22c75de6a3de58e97cb2ba89da72f. 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/TCAER2054198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30ffcd430aafdacf19370e24bbff2212e700e99fd3e7ca129f4b62c17fd8559. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAET2079932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dbd2be6709d86be8431ad54f01bf3895cec0abe4a390e2d74f84d50b2e51fa. 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/MYIT12200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe16d1802523cee45fc71c98613abe85b0339526e3c280cc1e07f197e4e58f. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/MYIT12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74543706ebda698dd8ad9398442f665d51b4cbbdb362a4f2c2251acc7f796a96. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/DGA052336201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394316c26e0ff531f02d5955ae4c331e6f19ad7bd674f3d0dec15029225ed1af. 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/TCAHJ2332523.