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 0xdce28287a53ec0dc0a5db4119c11098988798cd59cd7685305e1e698a1839adf. 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/ccb04177-2e28-4526-ae77-98c91f41316a.json and https://artists.proofprofile.net/proofs/artist/ccb04177-2e28-4526-ae77-98c91f41316a.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 0x8549425caf763438050a4fc3ec112bf028a14beef10227c07e9ce5323f83f8a0. 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/JPR751900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cc191039285d01e09b6567ed788472541647e3fa95cb09b2c02f05d7e7ed87. 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/JPR751900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47dc6edf74530584fa2e52ed306bb9eb37d11ebdf2d09d012ab91b194da9148. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPR751900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905f0644c38e150a3c898a31b6864c60b4b35441095bcb5f055aec06c66c04ee. 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/JPR751900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaafcbcccae17b640bf1c91284e439a699dd84a2276e380989c490270d6d3c0a. 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/JPR751900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bea6df608598f7d67778ce6c9b56a773a90d2cd282cc4976d3978a2d647eb4. 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/JPR751900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1798043ddb2243aaa5844ccc423f645da89a2a1ac37b4413d91ea1e39bdff43. 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/JPR751900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8549425caf763438050a4fc3ec112bf028a14beef10227c07e9ce5323f83f8a0. 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/JPR751900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cc191039285d01e09b6567ed788472541647e3fa95cb09b2c02f05d7e7ed87. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPR751900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47dc6edf74530584fa2e52ed306bb9eb37d11ebdf2d09d012ab91b194da9148. 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/JPR751900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bea6df608598f7d67778ce6c9b56a773a90d2cd282cc4976d3978a2d647eb4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPR751900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd19e63b2e113a963b59f39fc4cd276e2a80d9abb5a78b21c50b847774c5065. 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/JPR752000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd19e63b2e113a963b59f39fc4cd276e2a80d9abb5a78b21c50b847774c5065. 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/JPR752000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd7f88c10eab52476339eca05833e2d9ade98d5015f1eea321427a4826a9d0. 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/JPR752200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0840e2c9d9432d0fc696b1a6b37c4c41c0bbce320bdf74c44a1e52fc8bbdaa5a. 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/JPR752300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59669c033f8d506fa318f36b7b3b2bb80a1fd26511f22d15475c3c7f2dac8aa9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/JPR752300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0840e2c9d9432d0fc696b1a6b37c4c41c0bbce320bdf74c44a1e52fc8bbdaa5a. 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/JPR752300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59669c033f8d506fa318f36b7b3b2bb80a1fd26511f22d15475c3c7f2dac8aa9. 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/JPR752300061.