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 0x3a2beb83ce4a555432cf831e69d745a69135d35dd04070f45521f324e30436cb. 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/7f0ae8b9-fb1b-448d-a6cb-b41ea0ab46b0.json and https://artists.proofprofile.net/proofs/artist/7f0ae8b9-fb1b-448d-a6cb-b41ea0ab46b0.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 0x25bbfa3748e377190f35345b4e6bc12ea8b92e478c73d8fdb1ef45aa19313a39. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:18Z), 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/QZHN32295412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6294257e51b6ce90ebfa7e0eb0ae54cb8383d590e6315edbe9087f3ae3260dcb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32295414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8810dad4882fbb28e401ad61e8b55feda5a1197470511a1f6b2986799f7150. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN32295415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6339a97c30332dd9a8156eb9249f030b7786a104b9d1b9fae89b038dad3c91b3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6L2228710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39efeb00b01432a1dc4a4fd7dd04394bcca10e4e72a47f60411d7df10f224a0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6L2228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb83ee37f561a401885725ca6e1a249f4969cffc8f4e724ca2508e36dce2519a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZK6L2228715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b331790f842f96db3ad3f24fe6e369b8312ef97b20df2a56876e44c6023ee77. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:06Z), 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/QZMEM2233607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12c37fe1732ebd87b1a9122038c40596d24644e8287371c5c1ae1571b34033d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLR2250122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac22196b1ac6edb55a00212ea90f8d2885fef86348d631f9d4c8edb693a5a1bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPLR2250788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe167289a345677c296b5dfc1a636a49114ad2f82f3ff83de9024a817bccc00b0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFYY2318273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ebbb4cace98807bb92be39c346b00095855156aefaca735ba6e08bc0aeaf9a. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZNWT2330855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa340482d56eea5969d869aec94362da47ada502962c61fe653ae930af33fb7b8. 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/QZWFL2476355.