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 0x98c8c60fa156cc74a1df9c6041217e7501af5cf5c5c181db4bfe82df37d313e7. 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/be18dd0c-f118-48e8-80cc-0b8173d715ce.json and https://artists.proofprofile.net/proofs/artist/be18dd0c-f118-48e8-80cc-0b8173d715ce.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 0x85caf348965dd399c552fef296c9f803e9ae83edd65d27052e574dd3e96f2285. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAS2225893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ebe69480c45a6f606a2e79bac54383295919547013fd813fdaad6f57357db. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:26Z), 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/QZTAY2266703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45083d4b7b3b4710d59fa50d2a63a7e8ac3c2bde7d286a437bfcce11db0f0e8. 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/QZTAY2266704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b62cb300503a985addccb8aa8c0105644392af93d0d6095405c4ba5897fb28c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:25:44Z), 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/QZFZ62376391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38288892ee16ceb1bf1d2efbd85674a99cee1dfd9492f145848718e32052e636. 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/QZHN52349164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86e97739e15ef55b536bd968e92b332dc14b943eba051d2db98fa6f1fdefb56. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:13Z), 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/QZMEM2352745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c924826005af3a82a9525031e77ccff8ab6b2806c8dd89b91c9439f2497b54. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2352751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473969b821f8b8631f8c4d1fe27fa693652b6184c40e96293c02dd565124bb03. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:35Z), 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/QZTBA2317837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7141bf1746e7257cf56fb752f076a567233a04b66e755017685b7ba9d06fcb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBA2317838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c71c71762f661247bd28515700bace87461302b85503fc019b47898912757a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBA2317839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d531fb42b83b4385f6a3e506fa940e585be8e6c4ab5d474b7d741376763f094. 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/QZWFF2342637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d0500fc77564e04dfa745b4ceb96862403d2817bd43124399dadbd561e32c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFN2317568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc05a2ddaa912ce47241c7e085364ac43847d17fb1d8a4cc1f15fa89d00583. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZFZ32411070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9173d8264677a772f004aea98c65dd67af1e42c9afbb76ac023a52f453157bee. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:33:57Z), 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/QZFZ32411071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29511d0bef13ed1c6ffc14a24ed60a1922c64dcbe14a3985460e1f7037096d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZJ842401129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2090742bcd9ade753beda33361fb0c9c74a5996351612567863fee0030439. 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/QZJ842402727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3458dd35e2e9df239707d75f35935f6f49dc285ca09fe66fa60d62faed56dc2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZJ842402990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f448641da96fec110144e22c42a3e5944564a61c44cc48f08e110da58357c1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZJ842402991.