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 0xf575c806ef487492f1e7770a81ca8c85b079a510c0f5ec9e09dd4b9065204fbe. 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/49ff89bf-de9b-4732-a46a-b3962de78022.json and https://artists.proofprofile.net/proofs/artist/49ff89bf-de9b-4732-a46a-b3962de78022.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 0xe6c6d3986dbcf1b9c783be8afd9a4ebc4afefbf6f71d364556963381396048a9. 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/USWB10203598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fd9b5534e0b0c363d41b02b28e6aaa0138e9c99b1c8d9d20d4417783a1857f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USWB10002654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7de2a99040b721651097ba89fbbb786cab2189277a810dcbd972085b54f2c0. 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/USWB10002644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4498cdf79d8cc1aa96e832a0cc643bbf1b9965f9b1c5b9ee2055e9a909e85d35. 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/USWB10002649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df5667f353dd97981755245f183a61428542e3b9929f5753d221f377c902ee3. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USWB10203597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78948cf7050aef069b6d854e1bcfda268428822406d3305663310a795a994a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:00Z), 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/USWB10002652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bebb4201dd640ae9aeec3bebdb01e2d09f3ccf1efd9795864037551edde9fbf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USWB10002646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd11a75520d832354e311aaefdf26f4e29cb16b108bfe9f505ae2c9c3822cf5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USWB10808442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5f5dfbf6be8bc4e0b9e3242d06773dc200bb93c60fdc039e06e52108105f9. 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/USWB10002642.