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 0x00b64ca28c7b63b996766162065f7f86144bec0d8f43bc303347254dccfbb192. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64196ddf-94f1-4e7e-8b08-e09f41bdda79.json and https://artists.proofprofile.net/proofs/artist/64196ddf-94f1-4e7e-8b08-e09f41bdda79.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 0x78f3462f17dbcad9600134348786e5e8bd4c41377c7252f88ea1ffa99d5c191a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBLFP2385462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81386abdca50884dc2d4ec4c8b02a02ceaf68cffabb6b57c268d8c5aa035cf9. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBLFP2385459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb51887a4ec29491cfbc91004ca47ec50b4a3ed4e9b570cd8f1d2dc829373284. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLFP2392202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aab48623c5b14ead5bfcf07ac41bdf83478e6ec6540675062e035979386d21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMCFE1700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf77346c5bff2ae54d3992969c37ebc70b093abaa5c6bb92859ff224c325eb20. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBLFP2392203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fb5643734a12a835eebbe685011d35b66e9642d884bcee022d5eb7a3f56abb. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:16Z), 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/QMCFE1700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9de04fb6cf031712da05adfac139e3ef3a79225a5264ce831c990a7fa5c717. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:40:41Z), 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/GBLFP2392201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc238a27711e5d153c2942c2ab1c0d701a641b39a23957e83b78ede153c5c1cac. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBLFP2392204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6635482af805afd9191c712575eb98f718cc72c20f2738bc19249179a5bfeb6. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBLFP2392207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71b1e026ebe31f4ab142be3372acca96f2b30ee355cd2c9ed3cfdc5aaacece. 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/GBLFP2392209.