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 0xa8be4d966856461630e5b0c4327b9e7e86c20def9269d8425ab56884e2113ab5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bea8da0-6b75-40fc-988f-92df1a1132ae.json and https://artists.proofprofile.net/proofs/artist/9bea8da0-6b75-40fc-988f-92df1a1132ae.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 0xcfef9e44a2eb407e20d24be03152ebdf871c56cc6a3d8b888f7336eef3106eb7. 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/QZHNA2037355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa926f20e7c5f962e1079ec9d4716d7d9491d1f4ff879a08f4644bb83e67bd64c. 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/QZHNA2037357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45459069f89d2b8e63970025778c593474ba9fe3dc19b67c040e0fba45552025. 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/QZHNA2037358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a2de0f9f4c9be2089a18f361fe524c5cd48bbe32d304bb610e6a5e926843d. 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/QZHNA2037361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1cd7c5a6a15a10e760e15d24fc95d0873ac2d153fba33ddb1cbfd602026bd. 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/QZHNA2037364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7671e7a051672f50d87ee0b2e34cfa0f24cbb51c7d172a32bdda89ef9be0d5d6. 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/NL7DA2300564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ea5bb5029641e0324925c519a30ff6a1a4bc7bf614dd1fcf3cd340a8e16b1. 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/NL7DA2300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ea5bb5029641e0324925c519a30ff6a1a4bc7bf614dd1fcf3cd340a8e16b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL7DA2300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ed4016b05564f31567e5084059186ed6e569a7d1e99e534d622960d12ba99. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL7DA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd614893df093ce203d0282c01ce45cf54adb2148a1039a3b62309b4b55e53. 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/NL7DA2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df25126df467e0786c28229f6a6ab01f8b0d6ccfa2940fb928f60466c612a4. 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/NL7DA2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef081c36d4ed35b3d502835150cfce22997fb1497588ef468c6c66400b209d0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL7DA2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449a0b0484cc26a2324e94569234e80efd32ecf5e93a38f990df60031a1b5d7. 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/NL7DA2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef081c36d4ed35b3d502835150cfce22997fb1497588ef468c6c66400b209d0. 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/NL7DA2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f0fcafef719d5b324e875c13d1fb866eb351bb390ea7518887ed2df2f4903b. 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/QZNWT2261369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588dc46e54d2fccad087b0536d3a0dc4c31bf5a4ddc400d7b1fa2c4f2ad34316. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWT2179707.