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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4874bcd98663c2e9331e9dc0311e8fdd606d54981f47acf9635641e45a80a4a8. 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/86c154f1-4c43-4e46-911c-d4df6200e1fd.json and https://artists.proofprofile.net/proofs/artist/86c154f1-4c43-4e46-911c-d4df6200e1fd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2d7f194dc6e5d750ff7d54003c0077c71ee8665a83e9b6d167ced36b7eb0bc. 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/USDY42004312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e259b90ea0729824bc7d481d7e27263dc230edd7a1baed8cdfcc0ee3cb0f8e. 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/USDY42004313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d99aeaf83f26a24ec0c27560642088fd3763779a181f646739a0722b8eab937. 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/USDY42004315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b068ce6231bcd0bacd9e5b21beeb7b68c59d6a9b6a832f8a1c8258dfe700044. 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/USDY42004316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd890126e2b2b4dcd6c77a73cc1bf7da3addfe7ece053fd6a53eb196c5b98ad0c. 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/USDY42004317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc814db35673e4fcc7236d32f16272ebb19ad758ce744b70f8cbfca6dcbbab958. 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/USCGH1766975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49a816fdaefc1cba9f8db920070f142800434b9933d7fe4464d0a88ad96a46. 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/USCGH1766977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cec9e5a5a7e3488c96c05289d5a13a467121f0616493b0d2aa881c28c313cf6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH1766978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f80777f7d79a23fe0ec48ba1be992c9703d87b064566bc1bc62cdd39f312cd6. 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/USCGH1766979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcc59fa790980cb213d083d6873fde5a1af5b87011b5d62730bef52ffa478cf. 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/USCGH1766980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaef839b8d1ec0aaae9b49d48be2dabd5d45c3b12d274991ccceec1feb793286. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGH1766981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2132a2879c8bd6309cfcbc97f85379b2c8c5380a4a5419525d0e8deaa16e40. 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/USCGH1766982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed867d40d291506fc73e92ca54f5525f5fc873e81da3ed31ca8392a9abd25512. 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/USCGH1766983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b014409d88482df4d44e9e207ee90e0d79158d0722b7a57cb588527843f322f. 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/USCGH1766984.
Al Fondo Del Mar (feat. Dr. Shenka of P.Rococo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040dbd4a72e3a3d6582c99ba1d6dbeaad7d6090e854061515159c5eb8708d2ba. 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/TCACH1502115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029b49109f3844521f352c33a40aeebbe23520a1e2b2c13b701c28e42a447bd1. 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/TCACH1502125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a600c9ff7c0d6550583d6cfdea965fa4ef4534401ec897bf96cc25be26a608b. 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/TCACH1502132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b75ae03fccaf1915a3a77dc82df4a0030718f243a03195ee1d5d40c81d2c3c. 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/TCACH1502134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ea9231abf415ddfb0bfd19a1aa66fa8064e1ecee08a8b613909e99076fbab0. 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/TCACH1502143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d598bd8e05adb130f469bf98db2b1f9ca352b3d3457c8c88b3caf1138e174d7. 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/USESK1329168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f6704cfd01c45a106f5f4dbb97165494b59289b80c21404d0dfbca739ceb9. 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/USESK1329175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5932e119f3df06c9ae464e7270e0e33303964fbd28e87260820eef7d28c72f. 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/USESK1329179.