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 0x05aaca85fba7a77f7551890bf7d614d0cec3e3422bc952ad4f10a7524034fbbd. 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/f66d9e0c-31e5-4dc9-b808-de21c60e26cf.json and https://artists.proofprofile.net/proofs/artist/f66d9e0c-31e5-4dc9-b808-de21c60e26cf.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 0x8bd2100f0915fcbac29bba7dd7a0e8e8fa79822bb36a812a80fc63a9d1da9241. 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/DEY472178027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7234c6e40295c99b59b85e5bf55eb356b7aea46f6f9e757d6a375ca5e5696e. 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/GBKQU2418720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b3635c6c7e853df3f5b04b4b30eca0e8f26879eb6149ef7502c3db05a21961. 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/US2252442001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa06fbd6fac47e8be2a4cf380892115cb9fbb601238e114d4933e9f5552207b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US2252341601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf69bb5c2de4485c0a5200b2feaadf0dcc7de562972bd89cdd45ee49d60b8385. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US2252341201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95b17d2092d77fecca445631daf58800137a6ed52fdd3c205c776ed2b55d8c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742323569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565b6032548471ee25250cd8f4e9ba33ba9fab98a014e0e385c39af0ba692e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEH742323571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d76cfa4e5cd8842cc16b1e2d095ae1b8792b540d4ce4a31ffa7ca3fc41963f. 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/US2252237202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bd84ac2d9c2ce6e3cfbcfdcb38881dc77c4258e3e4070d072640ce347fec21. 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/US2252339301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf606a555b946b2374d82add6fea72cf4b9825f7cae3a4caa83b825046343f078. 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/GBKQU2268487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4cdaaf9771fe9656832fbb7c32590c0b3ec7e8a65f0613c5aa07c5d11f7879. 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/GBKQU2268488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc31d6a9e4f6bd160ee8223bafd8606316f4a05676c81bebb665453651af2705. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2261917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59063e8b43332df834d0d1dce5f7baa7434cdb3c28546b0f82fc1c0c70dc962. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2261918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79731c1e0ed17f2ee9ad5c9fe875ab3636a0d75b0e059040d3df438c6f93b21. 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/US2252237201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d76cfa4e5cd8842cc16b1e2d095ae1b8792b540d4ce4a31ffa7ca3fc41963f. 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/US2252237202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8642f4b4d854acfdb80985a79920d816d7f4830c87c8ea5173cba868c400c95. 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/GBKQU2187633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6899393811e90bb693198216f8f352d60594fb22dcce8ecc43f5e4b45ade76b3. 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/US2252135601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f36159861654aaecb499d3ed86c7580409186a2e6927e51d614ce20e09d45e. 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/GBLV62018977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8445e52556da5ed1b3c9fc26c81ae3fc97079384640732ad2bae91e10f47665d. 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/GBKQU2095253.