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 0x92b2ee64dd85f9971703a6c0302ed37e73bb8069addfe7f45cb1284951c7d20d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4214b871-9be8-45fa-9b16-e2e1e717feca.json and https://artists.proofprofile.net/proofs/artist/4214b871-9be8-45fa-9b16-e2e1e717feca.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 0x4a87c22b29c48209df41a446672a9d4a344946f5e7e31a4753353434a273ccf3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:49Z), 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/TCADZ1871823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b22ae46055b99df8fb37628a9e94c5232e5de50a858f9c90c427e0b8109351d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAFK2101269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f267862fc758c584b76d3f98d35e74f8df49202d14a672c3f7722402daee691. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAFK2101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5500f14dd4e3d7d635a666a255b764a66be031f268e3af649013862c759c018. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/TCAFK2101343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64922aa573f67c6596f10c3b44314b087c5ad33a7f5fc051481715240c3f5c19. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:55Z), 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/TCAGC2265385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6414501ac1b584467261668db1029d0e992ded36e55e7ac091e14e8377af09a1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ62442169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c7bdd895f298ca20c548fc16fbdb95bbe620c5aa24309851986c2bce8859b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:58Z), 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/QZNWQ2437956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008e08faa14991505c6cd48fac6b79d0529c4ad9862b87b8cca48956da75699e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWQ2437958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2390acc6a9fbd5028170da0d910dd75126e087559b48311fc469c7441b1f6fe. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:23:25Z), 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/QZTBC2572170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8047db1fd4ab821b6281fd3156adc1322cefb6dfa809c60faa339dc03578df13. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QT3FB2519753.