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 0xb2d537a21bb108e439f6e357e98312ea05cbdf6416f41726933af86221597b65. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aedd7a2c-935b-4e6a-b8e2-f8dc8e27b5d3.json and https://artists.proofprofile.net/proofs/artist/aedd7a2c-935b-4e6a-b8e2-f8dc8e27b5d3.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 0x9a9babad00db512780cf4d0f39a322678d1d3efb49e52f4f747730daf6c2c7f7. 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/QMBZ92362455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9cb5d01ea965f8fd3f8ee924be7e8ba46655575348748c656b0fc3be9e112. 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/QMDA72292980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6a611b54e4dc8181249388ad20e5fc5169961e887781eff84923fe69239e14. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBKPL2211409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fa9a43c81fd4e481ae0c67ac86f93f0c301107174499f41c0f4de9e6c2db7a. 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/GBKPL2291651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2965539c17dbbe7141a0df66272e8c8effa69a6ce6bb7c447d68507551d1d0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBKPL2168127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743bc9d7de074ed3fc82377d902a2730351f2415fe944d2638707d7f50e1325. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/GBKPL2148171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c85baaf0e2d98872dde8038138a4b818d9a28d7a1df8475a1efd397c84acda. 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/GBKPL2137540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449a230bd50aba043c2cf5e528b4abbc0094b5d7909bade87711a394d1d9b08. 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/GBKPL2091661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dcf7f995e51a3e959e2f3f413b7862be2d4c331e6cfe681b6507a070dcd960. 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/GBKPL2006549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690f1d27cd97c326b8288ef940a72e168b74ee4db496874c5a736bfa10b85fae. 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/GBKPL2097589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d695296aabc3587b5064b207a108f182080b97100b946ab5030a4ef56af61. 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/GBKPL2096629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690f1d27cd97c326b8288ef940a72e168b74ee4db496874c5a736bfa10b85fae. 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/GBKPL2097589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb449a230bd50aba043c2cf5e528b4abbc0094b5d7909bade87711a394d1d9b08. 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/GBKPL2091661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8449f48dde397eb7aa67d07aebf3e84af8b88d0bcd33d217b8201b8caf169b2d. 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/GBKPL1958266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea496c45de2d0397b5fea3c2589f059acd472871fe739bc7a3e48b51a30a97. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBMJG1907284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e0fbb3fea86bba6f53cc2dfdd6ccaf95190798a684345e1f900f9a3ba5c0b7. 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/GBMJG1901720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa955fb814673d056287a3492cc977350b852923e9cebbf2ad3b4ca6f38b3e. 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/GBMJG1808934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352bc65563361bed53dd54fee168dd6fbcbcb9c8c143da4dc5731a41bf2e799e. 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/GBMJG1808935.