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 0x652b820523f9f7b819713b7324fbb350e6631e87bc739b256c4327b6067af467. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54d40bdd-4c5a-4829-855a-0298c394420d.json and https://artists.proofprofile.net/proofs/artist/54d40bdd-4c5a-4829-855a-0298c394420d.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 0x3523e2917e7b814ad1cf823fd19cad75bf3831da4a329b78daae27517bbd3c93. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAGJ2256065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace21211ba1e1110dcf14d87c6cb48c1d676074dca33f5f398b92746d6482a9d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:28:30Z), 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/TCAGN2275151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09289d7e047643b4b06dc38758fb3e63ce1ae91931ad467f6cd79f9bd2d341. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:36:27Z), 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/TCAHB2305263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da7b1c95ff71252e4cc9d16893eae065756ba7375b8c86509248ed4a7434bd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:34:45Z), 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/TCAIE2408180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6fa9e37eee898e57d338802db8306bfd232948493e8408d240f09bff289e7. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/TCAJC2425840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a29a706487e1268fbcb5944ac9752d6f55e3123b60c9390feb2d091b8db7f. 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/TCAJI2599799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1544e316728acdb3a8655e788aedc2805e1c2144d2ccc8b2d00fa7a16c60ed. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJM2598683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad64122f3cb11ea45e861b4ac5fb4ea01f4a92006e137b26d5d83466ba5fb50. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAHZ2462496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6fa9e37eee898e57d338802db8306bfd232948493e8408d240f09bff289e7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJC2425840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe661ad6895c4a8f411b18390c4ad0621eed9c5c7464aa670199eac7f3a6c2b53. 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/TCAJN2569100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d7b9891c8e3dd71a473e3933742b0e4998da14c26d46a3995dffcbf4654a9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJU2565851.