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 0x86d79015d1548d33daa41948e636ba3f423ccd15a8008bd017dfdacfa99a8732. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa0561f8-48db-4023-b3ae-0b2ca96d4313.json and https://artists.proofprofile.net/proofs/artist/aa0561f8-48db-4023-b3ae-0b2ca96d4313.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 0x62b81a5db92a4c9c6617a7817b72590050edb33a3dd6c0509bfacd2dfa71f0bd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:34:45Z), 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/QZTAS2357180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6f958f7fcc181acc64b385c544bf101702cf22e1b13936fb232edb33786a48. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAS2357181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09d40f72585a536c27f31df9ef3a6a0fd2619c3dcb3fecb4d1a67c2b27b4911. 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/QZTAS2357182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b58fbc3e8a0157889cb5eb74f950dcbd6e3ceb8bb4cf3a7f47980372f0f1f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2357183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69442765164b39afffabb7185ffdaadfd30011b3b61c9e08a48505e3e20d0d8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTAS2357184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645a3a0a48e250d436d11674954cf9bfa789595fef794f41433f2a82ff992fe. 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/QZTAS2357186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870360c0564db22b42d756e9bbce26978c3d86d72bfc6654ae7ffb9e567b735f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTAS2357187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8150d994c8a7db26093d2e2a9073788b35bc21f8a99e0b10f056049fcd5cc530. 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/QZTAS2357188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e81e1582642db32b5352f3ba0a73cb6efdc4e0c0635ee40e683ec6033a817. 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/QZTAS2357189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae2ca69efd8e04ac2d2bf63c0bc2ad73afee8df4aef83478edfce904b77a162. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:29Z), 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/QZTB72310877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8217e4860dbea2844e6951374e84b37cfc859d3a81665b212b89d14df9b1e3e. 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/QZNWV2514019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb05f70e6cefc26959a494daccf16adc49e3aeb9240d8f3702a6c254423db3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWV2514020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5d46115dcfd8e6550a5536557aff6b7fa5e4e4a4246c759c6cf7e1f715c115. 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/QZNWV2514021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307fcaa3146cf76640730c2482234b4c3cd166549e8b284103aa076c1db61aa6. 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/QZNWV2514022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd725a0c54404cfb0551b4cd92194117bf9d6646a46fc589fa54e9637eeb51f4f. 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/QZNWV2514023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda4ee64f84471c034b38eede3d465f3f6cd5df31d1fc9b1bb58df242a7bdd99. 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/QZNWV2514024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1d417f80de34731bdab8960d2b3821744c61643c6f0d8cef91fd9f84443a23. 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/QZNWV2514025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057ab7755db4c79baf253db77adefce50302f14a1f698fb35f29cab31976bd33. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWV2514026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915917145697989dfb57110d215ccce5db99c7ec504a3c0287395b9e0d3e4b97. 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/QZNWV2514027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92061eaaba976ef872a67c0cc964e5b202943b9ccf4eb69756d5c95bd1aae4b1. 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/QZNWV2514028.