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 0xd1abf5808d8c3b76d9791cde1fbb593a9908181d07f8acb84c1f1cb04b2e3314. 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/4a4baa10-1982-4d60-bcbf-8058713f58c2.json and https://artists.proofprofile.net/proofs/artist/4a4baa10-1982-4d60-bcbf-8058713f58c2.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 0x78bc9160bf8d00bd16b607a244629923a9ad11c751712776e8f0b374a8815133. 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/QZNMY2245266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6161ca35f8014e850b6c879205d346eaa3439d140e81bc375ef34c55e97a8d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:32Z), 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/QZNMY2255365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6cb30f65443fa261c0e26c18a58f5395b12b1a9df0c0e9320029d5dfbe739. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA62366520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3520b1198636fcc79f8bb832b268b76dd670f600d7f57a04990a85b602881c82. 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/QZDA62366522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180779554ecc700657d30189f3f142eb7a57e2691261d6ffe0d5ef50ecdeaa43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA62366523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7036f98107c7d1abf72aea49e8690b46bb583b0f5cdabf5e2b12b1e2ef6000dc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:21Z), 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/QZDA62366524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159f0e9cf7c29299abce8d17005fd425e40685b033d33ada5e9f43b90e2a839. 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/QZDA62366525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260c80dde37cf3e56f1d5d5958310478dc943a3dc73146dce26277cbfb4e2a2c. 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/QZDA62366526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5861cc22212b47962282ed8d7ac639847dcc5a41ad729c60856b2dd86739ab1. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZDA62366529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6c6b94d15d073537569d3dda5276f258b61604e4d271163f910b1bb3e3a79f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62366533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2b1dfc3cdf41f8e544ec31689ce8e00d3213a3c856972099160c69bfdf3ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZQAY2375908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556b53e5f15f8bb5ec8b4a78494b839158b2efb3b072257b86f49f4dbfff454. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB92312221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd312775155f39cbfc8c9c55bfdfd994fe3ea9b3480a29e5f29f76355836e5181. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAS2449970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3e028d7a8f036fc2ae4886bdb8226d5c9b1460c14740b8bedc17cc07a8be46. 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/QZTAS2452900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e0c28fd0a94479c34af5c8764aed1e94f072b0daa72be9a674e5730fd6cfd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTAS2451803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fd2cd6acb74d53ba368e94098b799fdfe0600bba5c28dc8c2a45741dd28e15. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZTAW2438275.