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 0x7eb5f811fc213ef55d66d0f17e2e5378ca2ebe05949c371f979e0f1151a4c708. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04c09a8e-6731-4100-90c9-56ff50fc3439.json and https://artists.proofprofile.net/proofs/artist/04c09a8e-6731-4100-90c9-56ff50fc3439.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 0x2cb968f7b8e425f757e8131a68e44b8570898add46acf6cbecda4f7ae0d9b0ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022271053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed75db4c4b543274e01046c7b179c3ccd7ba1bbda02bc59b7ee00726c95374d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022290548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4d45b0a44209b75a7beb23abbbb82ac3f6ad64804f68e6716dc780db5a638. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022290549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eeffad7a1df876a1574b929ef61fd7db6a219b6236691abcbba1d6304a2cea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022290924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b8f055e11955d7be936d2d10532f21eee0a2e47fb4d8fa32f3853a49c7ad4a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022291001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187282e09e4c372d70fbaf78d82014c9126d4598f0fc8557e665ad6fbf36b472. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022291061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325483b7a98809f19b831b3f6081d6007888c1d80a213cb44b4bd12616d8b560. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022291621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b54c4e14a325c5744250b8d87e619e5e507c8f202ad8786efc259f4afb9c21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022291620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5454370510ab75e9df20ed7926518c24fc1b3099574e17a5dda9e918555f0108. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ022291619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd64cae69dfa0fb97c242273221a01e0c4096df1bde9a62acccd56bb936bb03. 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/DEQ022291618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b496b9d15020260ae3e08f5d66c279ff8eaa2412a8f949f3d528e653e5c1f3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM3DF2269030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad0264ab17c7a922e797a43062919930f126717d94f380a1c910dd476b9b55c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEQ022391656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64745eee818a0efd9f85c1fa938c5235d500ff859c5ab4155beada6b84b42b74. 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/DEQ022384090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae4180044e4cf2c757c3f87ea4a73d34aa2a7ec9773bf65386153b50a54f316. 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/DEQ022384203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf945aa6e1c212980e51f1bc13401fa4b95b021fa138f70985c8d4cb9d2fc5a4b. 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/CH7812411817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5dbe6e4bd026b17b4c12960620149f1ee2e3454dc5bd02bad1a3c264a22292. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:13Z), 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/CH7812411818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b672f4f0b8896e0ecd43e1b5cb4e75b548b6fb9866013ab67c6339edd0220c5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:11Z), 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/US3DF2518916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdc1826815b9151ed6ef5e5a7fc3ec7002737b315c5efbd933a01102e8f158. 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/US3DF2518918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e3731a92916c0494f6277409752209e4150d793d5079acf0dd97e4c02ece2. 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/US3DF2598293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8771a74b1067805a6b381a4c36e50d5ea4e48706d7b78b6c0553e2b56283a3a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA072365243.