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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359639d147fe5f245b437157e7ed5efafdbe38a84751970e2fce29f99a9995f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9e696b9-b1c0-4b93-86d5-34ed2b7545df.json and https://artists.proofprofile.net/proofs/artist/a9e696b9-b1c0-4b93-86d5-34ed2b7545df.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f544a0d8dbfb3490c5422bcd7c5fa12ecb893b36105c3923fbf217007b2d41. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:02Z), 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/GBKPL2093785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92795bb7c4197b5f1768a30c7ca0d8fbfbc072f69e3f6b08c8c646b96ca41af7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBKPL2009668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d01c5d064d36929647de228d7b09ce57d9621255faf90eebf0c20fe9ba778. 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/BCD4N2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57517b82d29ac21a7696508733a8d3eadd1e17fe55bcacc12ed56bc378e1981d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3DF2151233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cf7e676080d48b95ccb0f9b344b47a0a0ef186561aa9f2c4d48a338cf6d734. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US3DF2156569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98be223562bb77d355cc217872d6c0076f28de11ea55216472bf5386ca546b7f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GX89G2215011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca07b55cba0e82a1e54e9f3d1edebabbec06ae3e4d8767c2fea819cb22a0e9a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2212753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3fd056e7ccced79373fd896dab3b56492d10d9775152edcbb42cfad6439a57. 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/USANG2223999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0324eb15f71eb69ac10246226f75f9fc9f2aec0ef31d908614b59464706ed83c. 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/USANG2225073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f450195a8e94406d134a26a8f41e867d4487b90ab961224f9b39e0c4a174a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:10:01Z), 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/USANG2225100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a74d5490e98f21f850b18f25bf751099108a303364a439ec5880970ecb4d1b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2350950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b965755fedcfce726d114c304e8df66fc5d11d7309047d23efd763169122c1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA5KR2374596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981d2efb35f0f1fce24616892dc724eb93b55ffef23fed304ab7d3651c2e8f2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:58:05Z), 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/CA5KR2378024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d01c5d064d36929647de228d7b09ce57d9621255faf90eebf0c20fe9ba778. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BCD4N2100015.