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 0x9abe2f7361233a13f26fc78e18e2f9a12a0b4dda7dc768bae22fef7b2efeeed7. 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/fb1bbd9f-55da-4120-bf2d-c66a952c7ac0.json and https://artists.proofprofile.net/proofs/artist/fb1bbd9f-55da-4120-bf2d-c66a952c7ac0.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 0xf06b900c8ecfbdc97bdc82c6e241eaad03cae81843a0c072832d7d54edd469f3. 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/USA2B2204711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b55f31b156736c138ba6b7eb9f688c5a4836c0cea48ea3c362a95935fee66. 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/USA2B2316514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb83585a0126b249855851a3784cf32d1bffb2939602b401a2d66ec6aa77e5d. 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/USA2B2316515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c267f07645500788b1951351ee5abe43ca9c9de3c4f06f3c3c2a600a1da7fb. 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/USA2B2316516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c44536f7abfed8d5753061ff2a3a600275da3c0f178d8d0ddf290b62d385efa. 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/USA2B2316517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149da00dc43fb417ce06afc524a40df844730e0a4212143330e95f4d1c0c037b. 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/USA2B2316518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bc754510223650cc5b1a6e8e09691191b4bd6c52bc789ea7416fb919d166f7. 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/USA2B2316519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dbea864bf51dbb85ff8849a6de6f38b59c6c34055b45c8f19f1e646db75397. 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/USA2B2316520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc3d5127e94480e7e416dce0f613f7636ce555a1599b043db659997fe3e7718. 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/USA2B2316521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235eeff0bb8bf2f03c530007e505cf3f4804c63bbf45bdff2501e1a75f35404. 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/USA2B2316522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987e9720a019e5d0fb587cf5b4fb9eb186b9287506171a791577e5342d525915. 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/USA2B2204712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c267f07645500788b1951351ee5abe43ca9c9de3c4f06f3c3c2a600a1da7fb. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2B2316516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b55f31b156736c138ba6b7eb9f688c5a4836c0cea48ea3c362a95935fee66. 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/USA2B2316514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb83585a0126b249855851a3784cf32d1bffb2939602b401a2d66ec6aa77e5d. 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/USA2B2316515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb83585a0126b249855851a3784cf32d1bffb2939602b401a2d66ec6aa77e5d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USA2B2316515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b55f31b156736c138ba6b7eb9f688c5a4836c0cea48ea3c362a95935fee66. 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/USA2B2316514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b900c8ecfbdc97bdc82c6e241eaad03cae81843a0c072832d7d54edd469f3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2B2204711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987e9720a019e5d0fb587cf5b4fb9eb186b9287506171a791577e5342d525915. 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/USA2B2204712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c37e830112623a88e3587127a1747bd1d585e5aed34d3e326db809f61b1219c. 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/USA2B2204713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2007d6381abf7ef06cee5e5b1420a1613addc155776a7c209ce79d3a6acb0b5b. 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/USA2B2204714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b900c8ecfbdc97bdc82c6e241eaad03cae81843a0c072832d7d54edd469f3. 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/USA2B2204711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41313f5ceed2551e82823d54be8d4f04cd408128079bf5b41595631e59005b9. 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/USFVZ1990187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957a4219822a4215139a47e44bc4c0f714177c07ad95677b46c9dafcf5be8519. 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/USHM91809435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cafd28a56c08f1cd255feede35d5683ddeab154a756c2e9dcad76d361a2ab07. 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/USHM91809436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b52d4630bc6e38ab8550e5f6e10743ddcfe9b1ed8d923ed30a5bcc6436bc85. 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/USHM91809437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe503e3dd24585948de9d13598799238fcb93761f2abd7c559beb70cf60548ad. 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/USHM91809438.