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 0x04511e7c002b881cd83bd6b6926537db20787166f8dc267592a39ea93ecd643d. 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/b1648a37-ca86-465c-8249-afca6f146937.json and https://artists.proofprofile.net/proofs/artist/b1648a37-ca86-465c-8249-afca6f146937.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 0x31cb7a715e24c0f75af785fb39cba1539b5120aa71f100cecd1b5768b3e46241. 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/GX89G2310472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca63541edb7bee78a3dd9b2d90b9e70ec48a7520f1d80bf458346c92c4d4020. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8KD2382894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9f891af3a2533fa43752f5810a80042ab191b43bd9918d05fb751a88071b17. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX8KD2324594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90803178cfb09661072e83dfb59d97bdcccb4276e22af956ac84736b097d0c8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX8KD2395352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb250614d79f5e4311b10658adb9b7696115806c3fd3ee8f30b193d2fd83418b6. 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/GX8KD2324622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63821f890502cc0e24acc0a45c05546d25bd23d569e6caaf05498a876371f179. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX8KD2318953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f001c2e23dc26e8f67069e95465dc44eb04c8dd0de2a975bac727f3d28038ff. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GX8KD2381842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b90e1e7adcfb28a6ca199aede0bfa138e8e585f56f397607729e645226026. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:22:12Z), 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/GX8KD2364993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9258bd6a38b64fa267da83150219d29ba29734c5993f24f09eb663e123ed44. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:07:03Z), 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/GX8KD2341075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d552666d5344d2613abfa4b6b7492eb66f6b7719693d7a55fdf0997d0ac16. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX8LE2357980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1ab54f75a3e4352d57ee125a3c50d05ac7c3cf66b53bc16ad95f148cbea920. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:45Z), 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/GXBDS2398441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8215d39e574aeec86cacc8e5aeb7418235b3382dd43c2ff28a1edbb4936d6f8. 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/GXBDS2388476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe540cb06bdeb17d9ce10980bafbdad3a40d9f02d2aee8ebacc8ad2cebcbc9159. 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/GXBDS2329649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a35cc537a16c9c1a141431b8c8ee47ecb93a1439071aff690225c66928034a. 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/GX8LD2315038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d4b6dcccc4120afa8ffe4a2b8f7c87f6abd38db833dd98afc9cf9181d8a820. 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/GX8LD2365581.