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 0x83118a1f05706fdd94e1738808b704ebf9442fd153f49c642f819c7421d098d9. 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/8e789f5e-4c1d-4edf-8aa6-901ea2e1c94f.json and https://artists.proofprofile.net/proofs/artist/8e789f5e-4c1d-4edf-8aa6-901ea2e1c94f.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 0x365f946931c3253cc1da6b3e887bb2c22de58d2f77aecdab1bfed7de31ce1346. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72435523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17549bfd14cd06082d5f0e39384dfdd4543561e3b0556df5fbde78fc8191c570. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:47:34Z), 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/QZFZ72435524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1315e7bb1750b939b624b15760a4aadc2590bafb61ae2bf42b2dcc041a83176. 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/QZFZ72435525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebe785eedd66ea98803c18f562b6b1d6976ef378815182141ffe4a97925d3f1. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZFZ72435526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522228efe46c8ad70dc403d2394b88e50ef44f2dcd813e5e6f3c068a0d878275. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ72435527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29cf834115306c4a07cc00bb30f6763eb15cc31eb24282f31f018480aaa546. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:27Z), 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/QZFZ72435528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ffe5eac923c3df7c7ec8f42fdce54fc7e6073e0d7736cb1f1185a505586ac. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZFZ72435529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609956cec3b2d727ef7e8231db47c78a1fbb8c80e719e566f9ad64584bb8d905. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ72435530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98845ed1e3ffb51c58e919aa26b86daaf5e5a350c86c6da7a50607443c895a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72435531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830aa20faea20f4048d2599e453427fd88359df624d25bc7cd0e5a0e304efc1c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72435532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3e73ff387b5c696496961a1009e6e7c5d81930ed3a2834430c6c3698b6b819. 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/QZFZ72435533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e363129a01374f59637b3b2e4e9a5abbeeda1f33c866e1992922d6d35592550. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ72435534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006d13219874329f9a70a6e74e3d41ee8e72f40b3e2f05d104129495e4d59684. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZFZ72435535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d988c57cecbd57148325526c3385d32b84ff0a2bd9c0dd5f572acab2adbd00b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72435536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1586ad24b91157b9cd8a57db8fcbcf21e54bfc36dfa7260cb92028de39a8e0a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72435537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a56df9ab7fa0690136d3545458ca97920f0b0c5e133bc83df15988668b11fd5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ72435538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cf8f7300355d9b6b0c46a1ea0e558a429de23c469aa6f9bac27c82e98f85e1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72435539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5224b2588b9af1631404ebd9c8d621ac0e4b40b38d4f8a0a0d5e060871ff657. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ72435540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c12d27ffa2c2cbd0520542c80d7e593a202872491c7c57c0019890739c67b4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72435541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98a71828ceddd25c4a7a7eee8b6b2ef98701ab1651bc83b5ac3d7d47822fc2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72435542.