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 0x023573a5be41a7d8fd4cf2585df7ec1319ee74f88b3a284eaded1c7496040075. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e27e6314-2e65-47dd-877b-680d467e7ee1.json and https://artists.proofprofile.net/proofs/artist/e27e6314-2e65-47dd-877b-680d467e7ee1.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 0xf293441a6b5a04d253b02f06293945c1bd021d8e8bf7e91e593826fad1681796. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:48:50Z), 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/DES562210040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c4494d1070be75ced14069d60a8c35ce1e878abf85bcfa9fb61eba6680e887. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:29Z), 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/GMBA21463006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46219ac410e00570a17239f4e5fa23f9f13c75432114696884484e04f2f4020. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBLFP1627988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09618f6504fabfaa0b5ee09e889c7b017c913860c3488659f0fc65f32db8e5b8. 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/GBLFP1627990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4bab04a32621ba76a6e4a729529a5b759b97a307d406ffccef0c21b9f7f822. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:11:48Z), 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/GBLFP1627991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb53062e1c6601a94ddaa62d70bea2e5fee421920b632bfbc7e92e8c89c8924e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBLFP1627992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf748e6512bb08a368d43de12785dddb20e6dd90eb52b76bee886aaeacec3c9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:00:28Z), 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/GBLFP1627993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb3c9752772d1e303b602c0ef31834a3690177548611fae554d108329ab1e1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBLFP1627994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9daebee10be9e73f552763295ec4811cd5e10f92ec7fc181594770ef8445c9c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:09Z), 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/DES562210076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8288ab2279bfd3754096ea4d1290d0997df42c4412796cea7667302f08d200d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DES562210077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0b0b9f887d5cffebca3142354bba494b98b4e2a109abbe29a1a8a38e2b0ca3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:46Z), 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/DES562210079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5fdbbe148314ddfcaddd8847dc179d91b6bbc5e03e61786057a4b3f3385afd. 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/DES562210080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f2156e600bc3d83b9c867a82d750377bd47eac92ed1fedd3f073d0ca538e09. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DES562210081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e758ab66bc7ab46a61fceddb0b13d7730b52b09c546ab2f2590f6a1548ffd6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:23:16Z), 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/DES562210082.