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 0x93297dbdb2d2ab5f1dac96af1ecd62495460ec054fe3b90978e5341f29cee354. 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/cbc475dc-9d40-4918-8b9f-5ecf1cf835cc.json and https://artists.proofprofile.net/proofs/artist/cbc475dc-9d40-4918-8b9f-5ecf1cf835cc.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 0x76d390ffd95c10a2b34f9017617815d454ff4df9fd7ee4a7a37cef2674bc9b56. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:22:20Z), 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/QZNWQ2068900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be558902ad589fa8b621280483682a222b69d11f6ca2522d194ed400ecbdc3d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNWQ2069859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b4de7245bbbbb6a59227c1f642e77ae917c8ca8da753719188b3a519b4db4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFZ52133159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab283435013297e589bc59f23c58bbd8be4ea709d1941724606787ef07adce7. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:41:53Z), 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/QZES62102619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71825c769b71cb3b8d3a8c165ca2179d6cdb027a13940082497bf0580bcfefcd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:39:21Z), 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/QZHN52181473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0addb47aaf297dd335773850d947a5e86881b0b893008a162b3bd6d2cee3ad9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:10Z), 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/QZK6Q2134629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef7195066d0ab207351524482a84c8603c12b64b4fb3538840474298455a049. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEN2197269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3228970db44b1c96bb37c29cc53deee83b5ad1113dce210cbc31555739d765. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ22274275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6635ec7622dfaa6588fa8c994f902d91fb047dbe5495e0e5654b26956194d5f3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN62282777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fe33681de8963cb41a9da21bf156b2cba176fd5b43dceaa6872691182fe6d7. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZK6F2273022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc447b539e7122fac41b4514c1748882dfc8375977a98d584b62969ee40e037a6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN52305732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a6901c539019ff0391cf2d3a086a9829df2a03466f3db9cbf04f13014cc50. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTB32372792.