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 0xceeb8897a000ad29895ddeaf5699c376861fb414da61f2e5056e7fa8cd767978. 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/398e460f-3182-4178-bd6b-d63ab4047de8.json and https://artists.proofprofile.net/proofs/artist/398e460f-3182-4178-bd6b-d63ab4047de8.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 0xeacdfe1d6c1e85c16d63fae94ee6900ac9c83e5f3fb0559b74f1a343c03ecd0f. 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/USA2P2345705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2a4722b833ade6f30ade92e34ff5c972f9f84b1e0fbd32349e9d89e9b27d65. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2359305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468b1dfd4d0a982d179555c1d6afb376b0f41c17a19843106fd87d0eae2d7cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2125371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a51a852ab584a8b07e2188ab09f9ca0e9391a6fd22e2be478ffb057fe0ebb18. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2304588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a481aa1bb4ccf24b3c9ad53a275aebbcc32ae43c98a19fa6a57bca6a3e88c64. 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/USA2P2218367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bcb8841b43737e05e6a4e5f68079aad9dcded6a884c12ba83d9efa90bfd8a4. 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/USA2P2218360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ef1268d9fb6fccdbb775d282e18859555bd965e92919e09620d918fceaa451. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2104523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7393b072c6ddbfaf76514ac58333ff8c60a95a877f8f5cc7503db98cad9daea9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2218361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aaa6d86add7d34d9b18fc373ea25e2674bda487d220596cc7008a778cc689f. 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/USA2P2218365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb5454fc3008299a9003e61ccb82b27c843a948ae80ec44f31665e5988c63a. 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/USA2P2218363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37783325a22d289523ffb81f781a7c1e276150c9ebc424e018d28f37c26367d. 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/USA2P2218362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5705da7f0e007d14376b26696a110da6c6784d51df63521677085cafc87d07. 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/USA2P2218366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f61f7fe62346c409d39c08dfc103f7f331287601b680dfaad2bcf98ab252e88. 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/USA2P2218364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e0972d1bf89e51fd797d5929ade06b3393ecca64317d8d6e4f8246dc0f289. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2435125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c973c5cc27711a51bf425836ee8c0adbf13d1587f3bcf43eb43e5d1a2d725ca. 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/USA2P2403859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550e8c396a1ca7d48111a4b292fcff707131315b125a5c131ac7d336a3190180. 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/USA2P2342934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66063c4e1ecf907824d23989d674fb28d411cd3648ebb55b2b28a83cbe213a9. 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/USA2P2329006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2843cff069dab02932c09cc5e010f1c1644876dab6e7e1dfc44b8da01a2fbb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2316558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c22f958c6feedd958a5c17e5e732719125b08f1b7c81d99c6bb90d1c1e7cc. 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/USA2P2250957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0df37de810cbdc863a89bad2f14bb496244176a73d6e66789b0cf72bb9941d. 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/USA2P2130524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ef1268d9fb6fccdbb775d282e18859555bd965e92919e09620d918fceaa451. 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/USA2P2104523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bc5973d6de74fd03b4d969cb91472215a4d2d3a53b41a17a227be9865e140f. 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/QM4TX2001356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4498cf08b8619bfa00bd7b719abcfe9e412d0ade0d7355c628c821c469fbdcd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWL12201508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7035d142d942a08e2110b9d888f130ce40dfdbf4d1b3bda6431002f1d2f31f53. 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/USA2P2117980.