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 0x3b1c5e5b08db72ee57c9700c1fec159ea9a7843480998b44d82a96353d2f7e26. 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/0f857a3c-737d-4d1d-98e5-3dfc31c6ea6b.json and https://artists.proofprofile.net/proofs/artist/0f857a3c-737d-4d1d-98e5-3dfc31c6ea6b.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 0x9ffa96343a414e365216aa52c1e5f34364a495864e8aeb04f74beb72cda49a48. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFPL1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a4891f593a63adeac551bfc3964dac890a80cc877a531053b5dc6924682751. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/CAM371902714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ce574d12b12236059d29dcf67ea311da33fb32a434fbc6a3ce21ce5f1d326. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAM371902831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624bb1166cfc4b6a30ece50ecab4672e35a02fb3b25eb587e9e9d282106190ae. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CAM372100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6b5307ec1cf51114cf82b92575c590ac52facf5b464517f7284ed71b969c5b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/CH3132216614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceddc1d8fdddda6be0b3d477406491dee8c1c3f9729133b77367f1035b184ba9. 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/CAM372200303.
Right Thing (Jack Trades Late Night Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dad2917a03059e68d9cb8823329ee662b18947ace0111608a81b966f2fb8d0. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/CAM372300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da734b15e258cead7278c196b2fd111413d6b552cc9f99f76e303481aeb94d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAM372300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b6041b8b773cb977ce2b93c42e5f057b4e4d4dc17f0e20f522577d896f96bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAM372300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131890e4fa0447345d5ea8e3a9fced6b86f4f9631fd098f22023deb9873a78d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAM372500067.
Tales From Another World, Volume 02 - Asia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5835c197b47da1d723784fd9ae80b0057f2715479d9dbd0b46c3d6b51d7d9935. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLD682202812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7ccff72f175714442ffc3f535731f1dc8152f67c802a9af5974f2efe5151da. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HUB921900092.
On Your Mind (Jack Trades Late Night Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0510683c6c1e6b9afe7f2e1e477648af27ea9ef5e72525eb099d56be31e9c24. 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/CAM371902912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2384143e45addfd051a0d8f3281e3482009fe780409ff4a6e75bfdf9a0dbf535. 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/GBKQU2189273.
Cheap Wine and Cigarettes (Jack Trades Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda68e96b7373f4c87adde8efbf46fcccb8175ad5c85163ed34adf7dd1f0cc661. 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/CA74P2300064.