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 0x6dd58763e2c0cfe68c790fcada545762dd385a8357dba8870f73e703d833d4c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcb4d543-6fe2-4b5a-b7fb-0f28c7708f0b.json and https://artists.proofprofile.net/proofs/artist/dcb4d543-6fe2-4b5a-b7fb-0f28c7708f0b.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 0xefaff326de67f08c7b8194dd9079c11347295e933910eb23536372477667a800. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:47:57Z), 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/QZFYX2395037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36b9c3675b0cf49840fa272ab5713e3fedd51ac04cb0a005875520c8a49f881. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN92377939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffbe8cc036e8f4833e71ba5f2c74c05115f79fb358400472bf3b70023bce5fb. 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/QZK6K2354105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b756c91591124000d94953aa4452d73eafcb1900a1e70ed1c25c4d6bab250. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:49Z), 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/QZTB92328892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88773d2c29f90997cbc69e25112b776fecb8f62fe5b7e868060d05fd840f2663. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ42463805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294ee02a1939e472e70c779c6553c05ed9253f9077d2e14df5e1b521ea12d5ba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ42463807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48d2ebf9d4b19b423ec6a2f020f99389e1e9d84ae157d03b9d0c0bb0948ee8. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZFZ42463808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d9a70f7e68441517ba93cfc62164656d1b223a91235427a2c3225aafdcee72. 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/QZFZ42463812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd598ceedaa132bb3cdad1c865ceb287c87a0c10ee938fe8fd2225564161096a8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES72443409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34075932fc051da6ea37c8ada791c8a162e439b639ad76c70870534755feac5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6J2480171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0fac56a3faa15c7ec641663738374bba18906cf66aea1aa840bebf658ede6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWX2429569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673c412a428fd5d3873399960b5651de123559e561669804f61b743f6beba3f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:00:48Z), 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/QZTAX2429429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c5e03e6c81c5bcde6ea7ab32c30affacbb8b05fcf37fd6158c7e666e4b012a. 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/QZTB62402343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d375150845c37b04e33f72651a895d12d7aa5ffeadb682e1827ee7e2c51db1. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:30Z), 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/QZTBA2474588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0126f37d8e64d24e1dab3521e62633a1e8150b7b522519a5aeb38dbb1e0a8866. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ782420048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8323b4238e8ab688f68142e0b0b07919adb4addcb8a8427bef080256cddac75. 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/QZDA62506864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ec10003064bed980e57dca86eb960951c6762ffab524820083c6ffdc036cde. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWR2544068.