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 0x2bf71f1258bb4bf57f070667ab958d451620388dee7ef347683b547e6924701d. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18e92d26-c20d-4b90-9c1a-0b1e74c60af5.json and https://artists.proofprofile.net/proofs/artist/18e92d26-c20d-4b90-9c1a-0b1e74c60af5.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 0x3c9aeaee2afabdc94ec339cb332877cdf4005390dc5f6be6b1d82469657f9e06. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJX2512305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fda8238e473a06d1fa2f550e67815de2232aef81a06512651fd6405205e649. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2512221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10854b7f7b35a68f1d7e3fe225f3ba68cb9dfae13c8eee91ba657fcda04926a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJW2513785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b128075da553fb3e70ce82b6a5d156cbfd7e8b15f90afc702c19972b2be537. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJW2514885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b27cbf1fd11840a22f50af985d588d41baf536c742bacc9a44c3a9d2d89185. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2554788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e19e18072e57a2b605ee67ff62a063adc9099d1eff9582fb585e5b4513de3d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2554813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc79eef6d6a468090e120df170b0ddacb2ed71cad2801586ada3ed1357ecec8b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJX2503133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faea16454da3d5e19e0a05c37d066bc927661d97b093139134900ec16400e59. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJX2503216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa117d7bd434b0401d08c681690a251d8e9458d3a87b50a85ee25f1c64a5b6446. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2503483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7430bd138657957edf533cb17c9f5f4e5ed4acaf6c0cc15a122eb66156b2555d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2503529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8654c6625561d5a440de5a95d356568918d1c76e3044cc08290d6371885bdf. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2535592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194ed6392175b0097afada8929ac35d194d50d9f9fbfc14213ebcb48806b4628. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJX2535635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86665dfaca47306e36a5a3c763dfe0723d5904dbd6ac8c47206295b44e51c68d. 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/TCAJX2535793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d14bddbbe2246acc449dd60c683482377d49aeaf10f39b966b2404af24189. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAJX2535683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6ffecd6587d4b1378b9b3269bf64a9b3e3b3bf70a12b91528a06c2e495c2a8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2567192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73d70bba79addf22a0d67b2d4e8bb636066bef777cfd806ade54a6c729883cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:20Z), 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/TCAJX2567182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33124f7689f94e83938f46ddfde5191965df66f59fb91fd167e600b3c6d7a22. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJY2567168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076a3d5c498833db39b4ba1f333224343ea74fc77b72443fb1235fa884b19bf3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJX2567216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f22cc772faefdb110a3effaee1c2ea859022e01bf24b76c73092191ab9f5b44. 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/TCAJY2567224.