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 0x8a77e08d9a819aae3325c2845886a8176191fb09aa58b2963053a46eae355bb8. 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/4547f749-e11b-4389-95de-dd345b623045.json and https://artists.proofprofile.net/proofs/artist/4547f749-e11b-4389-95de-dd345b623045.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 0x98ff83a6b44f4f8cad0c226a9236975a09be2facbc3f044b4c8955a38999b763. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:38Z), 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/NLF711505977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fbeaa945bb27dfa69f449bc22fa224adb5a1e58cfce2e6118d9c1a9fbdeb52. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:27:18Z), 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/DEUE21781537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389be96aaeb9241653f353eb3156a817b346fa5f4cd9a9843a97a8b7fb969c14. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEVU51729251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6dbe884e9c33c3d1cae7446002d864ba7dc733a798b1cdfd2315aad63bb37a. 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/DEH741812799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499043dbe984dd823144b8327d0c83f7ec3221021d94969b8d9002a26e893bde. 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/DEH742051594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9428dbc8af89e8daaf2f150bc52c17f141fb15245954df90afc4cb127b122b28. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEH741807084.
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 0xf217e1b3fc8f60b7f75dd9f2916c872b318b481cca730b6ee26f2224d3f41dc9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEH741917889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617592e61739e733b798366dfc88e3cd763e01558292925adb4f6ae4808d4ab. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBKQU2241640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4286836a30df9aa60ba182efeb36a01614f2ac56fe98a60b3a9b90b84a9ab40. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEH742206873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3ea06eae68282138cfb26c5537f5c7d57445ae8df2a0777bce5eb6ed145b96. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UK74K1400813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10d041b9b2bc912634ad540843ac9e434aebfe725426ebb8b9443d4d86e443d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:09Z), 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/US83Z2421406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134005e515598c5652903ffe01d884eebc7adcedcce585bc0f99a781d2ecf80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITSV22400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5bd5508c858b65dd7274bd39c43e24e06e382fecd1f0b19282b73abeee3ade. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CH3132500530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf787d3de774f4c1bb85c3476b8b2e252ceb84259a6e51ed97e2969e53160a9c7. 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/US83Z1817131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d3be2bd7addcd23295cee8976a5f52b5489477233862f8b190b8931c33dfb6. 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/ES84B1510397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490747f8c390d75aa98520397d3402077dbccf8351d1f9bb32bb4a0d7088c450. 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/DEH741913241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9296b4ab69eaa223c366353941ecbd38aeab8edcb892e58890e34764c02453e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US83Z2217090.