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 0x686becdb8454ce5d13169c913262fd43df3e093f9ade756c3420141cbffa0d40. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccf3478a-d7cd-464b-9650-3d36ec6fb1d8.json and https://artists.proofprofile.net/proofs/artist/ccf3478a-d7cd-464b-9650-3d36ec6fb1d8.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 0x6f639ec611e8df6e913ceba571e94e9d5b8c129ba0a9e3497543d3872696056d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:21:35Z), 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/CH6541882937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa87eb45f991c5571b23a11218ff2ef884d587ffc618a1c2c2d6ce3b26e1035. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/CH6541892857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894448de487339820b2deac847b277655382e21b7ceb724d97b000f5fc95551d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6541882734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8a8459099ae4e00d5f41d927af2cadf862fde791ac0a4038d707869a2c7b3. 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/CH6541882740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcaa63f8559ceca6bd06940d8d8b81d5748344f2ade2ca7766dc5db84f77b48. 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/CH6541882741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043d44478235630f759439d4b1d6c16dfd2daed99c6f8f4d9bc3aeaee091d8c. 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/CH6541882743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4113ffc33c8b4021a09964e41b9b1dbbaab65a3793100d97a529ad8f9cbd1. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/CH6541891089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667288f142ccb85d8d95a61eb671995defa4e19ffb235e7b07e6e5e799543f82. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CH6541890309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66ba386e36fab53e941706a141eecc40ff76c84681d6bbf20b9697466dc32d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CH6541892255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756dbc67ca49aeb2b86eda4a27dcb44eabdf783a27abca67a0566428f448d40. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6541890688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a78571e65161930e93f26c811af80db976a38dd7d2a01a8613c36d63d7d6e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CH6541890797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563fb82100c79adab751ba2436814388829459de07caab4262a6e3e6dd367ad4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:27:39Z), 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/CH6541893610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a89c010502236000840506923070b773af4c0f9b4a45b87ebe265d63c4be9f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CH6541893727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fac837f1c0e2c6fcc208bcd7284cfcd09d860abbad718b9aa31511797a51aa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:22:47Z), 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/CH6541891747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa84d4567e12fedcd248829fa49087270a018449b2056b2d6445ccb79d258c4f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CH6542116659.