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 0xdc3142451211d67ba059867635c25d7070e3c089e7d287a9d4a0306b7ed947f0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b0eadc8-2f10-46aa-8dc8-45df0ef6f871.json and https://artists.proofprofile.net/proofs/artist/9b0eadc8-2f10-46aa-8dc8-45df0ef6f871.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 0x9eda6c7cdb2b701b6acb246a30a0b8ac015f22484d2427190d7d69178058918e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:13Z), 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/ESA012483492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb68872d4319bcce0b61fc07fdcd74f1dcb78156e0bba1408c0b6185b9e57a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ESA012483496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970c0fa4b33e88759eb1f905aa8feca702076304f0c7bc89adb4b3fe8a70e30. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:39Z), 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/ESA012483498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408bbcc0730930ae3fbafbc775aa10dea4e7ed2c25b6929ec1ad20d82961212. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ESA012483500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c71cb3c9ad328b83f7eb7ba8adcb10bc13757c14295e050cc22c71460cb06f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ESA012483502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd2dcb11f6c3080220dfc1e54c9dc5201c1a4f2538a13c4ce5cf21f7099cf2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:58Z), 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/ESA012486831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acb98d3d9b8f6b959b1a17cb1891792aca37611bc16813991428ba3c07792d3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:36Z), 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/ESA012486834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58049823cc1f2ab8dba5e706964a3517f657c4ebca79d62b31ea80efb70b5cd8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ESA012486836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd932446e19fec354f868564acfdf5d760702c8599b4066376efe0a0a15277dd1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ESA012486842.