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 0xbf63d3811f82c71fa08e8a238a0137a04888895b0afba8837b6cc604dbdb80f0. 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/152777df-52a1-4a73-b36a-1e2c892e2c7e.json and https://artists.proofprofile.net/proofs/artist/152777df-52a1-4a73-b36a-1e2c892e2c7e.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 0x01256ef139ca959cac66820d7ef7e4943bdbbfddd5d678c3ba9bb504e60ad978. 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/DEY472171064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda01f46644455a783fafeb4540bbde19e31f2cec6bd8f9cf85e9171100df4bad. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEY472171065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb62d0198b2ca5f9c645f4c7c40990c8073a278752ccb285914253fff961d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2402390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e670a3cb68db3a16fc0905364fbf496e33555b21977b1ec161eeb5c3c6c011. 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/CH3132318235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa123e069b8d54374983eea517dfabc10f6979176c0593ec626d8d362f07ad844. 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/CH3132318236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e462c921db7748c9dc93da8b2595bab98d9295f5959910b5601966b41e1eae. 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/GBEWA2300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17462705862fc39d75e609fb3a6f93d452675eda65a9f9dda12878c00956f11b. 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/GBEWA2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5e29dc7ebd41a44e551b5270ddd6b33dba62db3e9c6c43a17bf0f74c069c43. 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/GBEWA2300312.
Between the Lines (Incl. Paradoks Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d9a02a071d80486a494690aa42597513c510bdab0afc7af3b52293d027cf9b. 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/CH3132217246.
Between the Lines - Paradoks Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f78d6971c8877878570a3be3ba9a16a6950dad0efc197f952bf46415a7b781. 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/CH3132217259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca477b978a24beea3cebebabf3ff1e531bf712c76c4abd54516ce4dec23f8c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CH7812233803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b0c222dde9a2297b0ebf20139e2a92852137572d575031a2b686eb80c3beee. 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/CH3132216713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68624d85c0b620828d6df6a9c6618c257b67224b7157b9667e271f564be0380. 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/CH3132115794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ee33d0f49265370ee8b2238eda8831daac3d411c795ff32832cd3dfc3eeed8. 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/US83Z2110714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206b75ffc9325dd09aabff43aaba16717a466afce3397bbc156f3d4a6b8e38c4. 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/US83Z2110717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae737cfda4a088a254db449bd62a622e8dc1ce405a393c9f979d7fcefbc8398b. 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/US83Z2110718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f75189d4ac0c7f2bbd899edc2fb9c79e5e3f5bdc44e8148ad7b2db60ee2e3b. 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/CH3131915405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5bf749f576a6ad9d1f2f60d1380ba032d2d1fddf29299a611622c178d19271. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH3131915407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b973e8090d16eb5c82e72734dd4aa66b3b4e326ad4561b09169d1d5edbffcc. 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/CH3131915406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427bac573ca99d32ccd4b8f33659ff38f1009ce228ca9061dada3cd8f33d378. 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/GBKQU2075641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172d4103f401da6008b3e8f9234ac42d71072d3a5d3e902bc859e55009347f1. 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/DEH742031082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9b65f62a5a7f7bdf5f7f0ab3614ab8c98652632dd70b1579c780bcba17f2b5. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ES98I1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91308c96ffd04c13fffc5426b173c8e7902841a1525059e955f5e537cfead64f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLV61822041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ed64ddefb7d892c2768505047133b7b884e1e897ee851582a908f7f40c3036. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:04Z), 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/GBEWA2401692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902a95987494cf07ba5bdc3786536ce991b21591a34dcbad44b34149667052c9. 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/US83Z2121387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f626051013733b49afc1edd51564cd6790db16e93c26efe8f524dbc4e34a54. 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/GBEWA2401586.