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 0x8cb9916b874ed106c244bbf7d974ee21710735cbfeb6cd999726f20093bf5ff2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d508e9d1-f29b-43c4-af74-2be341f6dc1b.json and https://artists.proofprofile.net/proofs/artist/d508e9d1-f29b-43c4-af74-2be341f6dc1b.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 0x9248cc1e3cde304c32a753c76cf470aacfe8984e1650d5637148002b4ad32748. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FI7S52300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db3dd23fe296bc0fa5fdf65a5b60dff23fb17c3c7b4f481a184fd4ccf3d06d. 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/FI7S52300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935c566d48cd0b2fb27c0a56a5d87580c7040763c7d990c2e9c49016c1cbe3fd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:35Z), 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/FI7S52300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7185a4ec32f242ff781b01c032e9a2b5e41cc0905511c82c4cbeb6b9457cbfc. 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/FI7S52300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cae5c5f8687fc2f2997003c708b6feb5c9688221989385f4cc14406b1610ce. 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/FI7S52300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8f229c53b158c6855810547ef63b640f0ff0e8a161e3477cfac167234e764. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:42Z), 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/FI7S52300254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7831a0902f7c19a7e8cd1e81b67ced151c48c89c11cac81f903df20f0a0284. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FI7S52000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090113d3786bf53c5456c533c367ca4f4dd96605ce985004bd6e4f627c906b7d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:24:22Z), 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/FI7S52000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346a69ec9419f55f4d9cac36e9ffc85a988b16716c8f94b899d892c14c1b21c8. 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/FI7S52000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c088ea3d76dbf009d84efc6b215a4350c06c24fa7f74213bbff11ede41498c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FI7S52000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e44dc9614120bf3f8d664c44d768824dc95e806ded1e30529c6e1835ba83a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FI7S52000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2e80b35c7745b1ea3dcbda6f704619e98e1905a3e942024cfc92c4e6e2fe95. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEXCH1700901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca66095ddbb238bed527550908ab55f92fdddfbb5d6621af7892ce0d52c8b7c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:14:28Z), 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/SEXCH1700902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ecb5de22e79617c66690b7600332e31396b169adaef4b9770f764958245798. 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/SEXCH1700906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16577a0d7c3f4b512580bb26bfb1e3ffa09b3b0e3112a9eef87ac28f928e94b2. 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/SEXCH1700907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935c566d48cd0b2fb27c0a56a5d87580c7040763c7d990c2e9c49016c1cbe3fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FI7S52300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77e44dc9614120bf3f8d664c44d768824dc95e806ded1e30529c6e1835ba83a. 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/FI7S52000084.