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 0x599697a1668444415722555b0491bb2f1a4320a77bb1ae251caea46958a3d6d7. 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/d8a7eb66-6853-457e-b883-ba4f12859288.json and https://artists.proofprofile.net/proofs/artist/d8a7eb66-6853-457e-b883-ba4f12859288.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 0xc6d24f71733ada8dc24a37f06c686abdda3d0f3e01646cd56f2edcd4de1b0e12. 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/QZNWZ2179892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be739c0ffce718bd8b69da34457a9089602cc7270fc150683c42a2eca91b545. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHNB2209212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c6a6a45aea1166c6c9d7b5c2d28d19751ea45372a543af913b1be2b7ec5129. 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/QZDA52345735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a7a11a0608632efe4bafab42cbd3632255d7c59d1187584d72234e82d8ed33. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:24Z), 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/QZES72352557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0068441b208e60cbcbd94b2d37db12a1187c3572eb227e98809b6646116e30c. 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/QZK6H2315125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1422f5b6b9b9e7491ce9e5e7bafa674b05176a68b9a78f3b58d1e275cd7e1680. 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/QZK6H2315127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f28eb518fb8cf974b650a5db805c49c04a840f904b12083b535015675694e9e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6H2315128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aeab27af68822628ed6a0439974e91078865f95be8e119d8636edeaaf45d17. 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/QZK6H2315131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6e6ae1bd0f34e0fa38ce39a4739dfe45b702a8c8daa81b2bbaf3250562cc5b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:20:18Z), 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/TCAHI2334334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f819e5521dcc77c1112f67c80862a8301d71216c10bee57efd7a17818e434. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEZC62405194.