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 0x760236ade6c436fa5cb04a863db8699c3002b5d7dc6aa796e6b0da1f8941de4c. 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/baf0bffa-8d67-4b25-84df-2ed7af1247be.json and https://artists.proofprofile.net/proofs/artist/baf0bffa-8d67-4b25-84df-2ed7af1247be.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 0x67e4904283e4583ec165a3bda324f4fcba110cd312ef2ba6882a3d8907063969. 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/BK4DA2401900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27725030fc77bea0b1b959f73e8b678d94747581512f6530fc89fc68770e34. 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/BK4DA2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c290b0a60a765a2da5b5fa2a6d810f3ea186657915ee2257a47d6df0b4f6b00. 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/BK4DA2401902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189abb7689ab76f22bd1b1f64325dbea327984a29676899157df7a6fb327348e. 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/BK4DA2401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c7893f2734a1aba90de613a705d66033741676594d2c1284e8e6012ed5ed3e. 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/BK4DA2401904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8d75cedb2619c4ca68355438ee23abaa36066c2e1919b5841192a4ca574d96. 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/BK4DA2401907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965047ebf2439d223cd1d499e0acad5692c11807fa1340452943a102334e2bc2. 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/BK4DA2401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8902581bd5f1f97a3e3d4ab7ffe011301ff9c15a56d33127db4cc3d7d095429. 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/BK4DA2401912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d060cb8a1941f609a40a789c30907e2b36409be142da3f85420abc9d98e1d0a. 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/BK4DA2401916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e2e83f21b4a7db6c9392a7893106183152fc736ae06ae0a9b092622857b52f. 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/BK4DA2401917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab33b57d37a7dcfcb5da20985464b1a577416753b0a0407a319dc85045719426. 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/BK4DA2215125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d3eef3745a5610b753e638f549931ebce5e49b19b4340892c5225eabc9340f. 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/BK4DA2215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0850d25f8b72f0be1b2da36bfb3ed0ca10936fdb2ac4387f97226ad0103223. 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/BK4DA2215127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e142bd77d772c4da0de5f215122cd783c88f92707ee96579eb0b4466d1a80c7. 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/BK4DA2215130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598b34940b49e7dfc33dc11f62cdb9c08c16110830e811236528e89c0d4e7717. 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/BK4DA2215134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e774cdec611708cad9c952db87b76c93d9ca0378f7ce79967409e4a1cd2912c. 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/BK4DA2215138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473cc3d77043652ac974dfee326801eb70b5c17497d6853295b2d17a886030b3. 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/QZNJV2167296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992c83763923ec4f66beec40330ee2a04b99eefe29613fca4228f238a4c1b90. 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/QZNJV2167297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c232cb1b5b377f1269a773d0eac515e4c6d3fc0dab15bb558fa1b326e76f694. 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/BK4DA2315012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32f7daf8f86af543c24bb09931235f4bcb357472a3e4accc0df2282b2fd1901. 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/BK4DA2315013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908bc093de1c47360910241f7fe84e8ddce8ef09f40a12dbacd28155dc3bb57b. 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/BK4DA2315014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243722be8b8400feb609615621bb4a75384e8f12176884d0aff435d0f5c5e95. 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/CLAA22200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb07af8289cebb9a56660d41b035f36fae725a255d052c89270b04fec5d7bc. 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/QZHZ62244211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc210edaa384c71f97b9c106b3c2260d49d1be9e8e2dd6c010fa6b401c2cd3c2. 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/QZHZ62244212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7afa2def6eaf03023fa396acf9a660e81a103f109764d88ad5b0126cfb3b11. 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/QZHZ52207130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad545a0e89b48269ff33026e380b652056dd384b205c1fe92a4d1157825d924. 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/QZHN72068389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc530ca48c8710f513e599386f4c343af7c52cc164fd16a5273c17794c9d840f3. 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/CLAA22000005.