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 0x0ba0539f3ab284814b223429b9404d9c802992cdc406448eeda0620fe9f6f397. 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/915fe24b-4660-42f7-b660-1a561705afef.json and https://artists.proofprofile.net/proofs/artist/915fe24b-4660-42f7-b660-1a561705afef.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 0x3b806dc4cc8c01862efef590478f932d58bfff6c046fdcb29e91bae1fcc20a38. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX852101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90947348e4da253598ae91f6de51f4dcc426e016756ebf2ef2583e667edec4. 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/FRX852101060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ce9a4b13879f0b4b1ffccb267c6e80e84b324047660908ee2a69497d86d8a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX852101180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4207d7ce2bd8e1e07d1d5cad4d0503813e8bbecf382ddd5c8e6ac14d6b5ca6c. 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/TCAHY2454580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e5e402ce7535d2935dfee1ce667be12d1812a3a3953492410fc2a3515610fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0L2319463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3991062fa8c88497c4441320098991fd530c55a57f34c370745a015fa8115934. 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/DGA092374554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862bfb0db21ad523c85a14b56037bd38a4ceab448d637839193e5cb9accbddb. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DGA082296957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b806dc4cc8c01862efef590478f932d58bfff6c046fdcb29e91bae1fcc20a38. 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/FRX852101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d4fa61b3f8e86c7794772da5985e233ecccfa1f0db772b28760a1e430a191. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX852100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a70bf186aa0529118e433c406ca71bbea3a6a659b05a95f60836dc054c2908. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W12012111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486b30cf842302a05a9808e56714a5222cd4726a96b3de7f147c1bc6353a1d8d. 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/TCAEG1948616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ce05cc3e7dde770bad296480b3513afc83bdfd7556b5bbf78a3cc09ff3a713. 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/TCAEA1834059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ae85350fb6a607481e6537467ed655634013c86efc26e4e184636a2bca6262. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADL1824562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f6416e7540ab2f167192b778ec948b2bbd62f53cb6eb278a21c2ed65a4c1c. 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/TCADG1797420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd9ebab476ef39d3d9f2fb921b8103e5b976bfc6cd884b56508114a231460a9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11914848.