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 0x9f703d1b778ba98ef598efdb776b3e93a1a00ef1fb0987a7774c024e92302b79. 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/27e9a3d1-e818-474e-8b10-d54782937aed.json and https://artists.proofprofile.net/proofs/artist/27e9a3d1-e818-474e-8b10-d54782937aed.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 0x0a6159770674e88e6bd1e4dfe368ad1944cc55cdcaf5e1857b7e732997ce2a1a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CH6542264121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7bbd3afcaa4fe5f31ef7ca552e44f5da1d024a4f8d86eaa1aa6d8559f24d66. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:39:15Z), 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/CH6542286100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a014752fc1bde595fa2fc372a49726e1a20fda76c2164a6d76114af4368bce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542295896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa712f2f7eae021717dd8a78fb331a8b6c31cb49e96ab90c1bf2e0372fc2ad3d1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542322647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a4e1a502476de675929bd065450a69f4f5af949cd9c025dfd840026e2b5908. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH6542322648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027938975eacd83f44c9ccaa8b20dd8c575d8de86d291361c97503a6cdd4725b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CH6542322649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de9fc074bb5a4de5a51b7d0adc263ecebd4d36f551e026e9d7e20d722a5708. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CH6542322652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319cbdaa300768f0f4926e950b5526082f4ee115a3d9645aabbd4ef8932bdae0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH6542371628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fa0143b8462a99ac467c5abfa98ded99c6301ded070b059edf724a0ffac752. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CH6542371866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f72c5c2ac698aaa16df5909e7ee0d38ad8a2f1fc67fcf5981acba35363f2927. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CH6542427703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7526e262b31188b005091492645d3c1957309c87d57f33d86ab19c8eec394c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH6542460588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a796c8e9b46bf1178698e9aeecd7367802a6439404d388ccbb2e00db6d509e. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/CH6542475822.