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 0xe7fb2700821ffcc07369e9a86a0d9222830ed38dec16b518a930217b69601f59. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e42f7e5-006d-4baa-82e8-8a8e8e39120b.json and https://artists.proofprofile.net/proofs/artist/8e42f7e5-006d-4baa-82e8-8a8e8e39120b.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 0x366d6d598a7f575aa8e81325941048a4085d5aad57adcd11540b3eabc28b3f5c. 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/QZQMB2107052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9892ea243006d9d09d41bf6e6eb710175536412923dcfd84c895964de95d475. 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/QZQMB2107058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde17aba92e97e7690e9c31adb3a4643e68cb56a5e4a304a2cf291c0849978ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2587049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7dc2e0e67b44dd7c11492b2bd3fefb257d70f42b04d39a0b6d3585fe989fdf. 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/QZDQH2425604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785891e417a624eb704e650a0d7d557ce0f0522e38b1886efb4c1524047686e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM82435961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8fdabc724675b31a3365dea1eb16eb5876f45f8fde5110de09570c53710119. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242446900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822341ade7b8576501ad6278251a21d054bbff15235bbbc73fa29454ef86796. 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/USL4Q2471021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82d8899d4d1eeb7923cd01b029dca7a1e66b6f7980341c60c018050be62c13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242446901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5068f0de9652b742991fd12540ee2285eb65d8d6a0813272d10132d004d1d0b4. 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/USY242446902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff2e191434a2807e11383cf523693c2b26ccb6554670abfa799f8a6d693917. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242446903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1215d430e3218aaa7f25a30b188dc5e9f7573e8a14a3ab8a4a26047293c0dd. 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/USY242446904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a160eedf564ad7c20df30ae3011cf8296ffab3d9c352dabe1784fce59f2cd9. 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/USY242446905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14018e8d405545694824737c81634d5149bfcf1a32186d66f984cf9d7c83a0f5. 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/USY242446906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ca21b82ad2fc36eba4d0955a2fed80661e12cb91fb3e5b3ee5f1b04788680f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USY242446907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f784ecda812d2039b4a0107c5cd62484a56512ba2eeab8f73091f87aafc3dc. 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/USY242446908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b56607a7006b14853e4ec5d1a8bc0602b4a93725437d7da01272ce006ffeef0. 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/USY242446909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19fda23e08edf9876335d622fbb4ba3c5044bec164c2d036ed314d125095222. 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/QM4TW2545239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e059fb52c4c652a40e00717e2acbc7895c5c962450d69a5d45fd8e928e07ca. 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/QM4TW2545246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50701153551def167d46ba1474b8c17cd1a3f2fe2e0ebec108ec9dc57b420641. 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/QM4TW2546478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a776d1df346baa691de5df3d2183905524919d769840ada29e1149fea06c21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2546479.