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 0x1859e8ee1c22e0ae908fb41e6419eb246e6f6feefa268f6616c81f0e75401d92. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8659a3f-9ffd-4d8b-9621-e10ce984f6ed.json and https://artists.proofprofile.net/proofs/artist/d8659a3f-9ffd-4d8b-9621-e10ce984f6ed.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 0xf9c5dc2943babaf01b41dc935bd43279fd805c7058f7f6732b4e12f505ed8d2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWW2493117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3caf9f869baa8f9eb3f8f48675114e7243c6aba111ea5b2dce741ee536b88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6J2402541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf302f9e3b359565d274ca82f26ffc712c0bd265eff7adbf90d7e21b680407022. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES92486683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f0af3a05f4dfb63bfd580edb23de1116fd1c23fd7fea45a503a2a6aa77cb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ32494318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63801f5c2e91c8396c4bc76300ea8bcb526c13e57596c5a66cedc7fa9f75c9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN72393525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0782efc2d3b8c04f74c6e680cc84780595efd7786a17b94c200438b57acea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTBA2267482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fdb8b6ee290a57ba86d29e1d7104688e09e36393d27e158793c3bce4bc6644. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMDA62252142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4eac59bdbaf777f3f49912700d01fca865ae452f3b6f53e19d9172cdc0b193. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6P2285780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5745cf128a2985ce015348e6f9d0558f9b5ed79347f170070c271695a37cdba9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAU2179935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86d0bbf116ea882e038fff10c9f90705889716c9067d07661ae9f80e4e044f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP42178638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ec54561fda938f1f79ccd70268b120c4e96472994e593fee2893d28900b42. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMER2173549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e94fddc889e98b3c866152eb32692e43bf2bbe6d10c39835195e59c0b14b02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNC2182148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeee8560fc515c2bfdd0cbb7eb63c3185db0a18a853fea6f2d58ccabfcb610e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWX2009008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8fc728ae016265144dca77dff273c17cee4f32a4b226b0f0808f7984a1f4e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEM2076543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768e2dc16218320d8e7da454fe11d98cadac4fbc211346892c0bd3df6585fb7f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2092281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59108298ad64cbf9e5a9f412b74224dd2bd81fa173b816430f1ccb08ac8b5b48. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82002390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ccfa8214eb1628d46ea285fbe658e80150da974c7882446240a9c4f109944. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ32090565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229b2b6c59cb1c6dcaa29bef95ef125fa5b412c60207a9ef26c4b99c112ba38. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6N1947370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf091129ff78369def8ef4c078f3092bab2bf1cbdac91cfb7f46c9d71ec67c37. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N1947371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43e8a844699d62e593df746134f2536f828629c01de7c7b76596a8fe74f6f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN81927496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585fc3bfefba1a9d97cd301452b115fe47213d0570e2525c74db6b5d5bb1728c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYY1974212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bf4e5d22a4006167264b6055e60af12aced768c309d41249c85fb4041ff73c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZES71976921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d953990f432378bb74d793abb4b42997dea6fe9e0c41ee4210229adddd0ac2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA41995393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd985313510d9f90fe835fbd45e5edbb2c59a19bfe612ca63c861e18a31792273. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES91882818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da522a7416196c52bb2afc35a7953fe899a2993c7b603b1b1bd5cd34e4f426a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA51812042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553960052d7d509bde54c71b5a680bc8ba481bef523f2d7fdc2e65bbf10f94f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZB4J1809711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a51ab29de0ba3889239abb16098fec55f05b04e1c8cbc9b60e3b4d41c3df32. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41892382.