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 0x79c3bf9962489a9e92e5e1542ba98c9106806e325bcb7ebb02230c5e5e6b82ce. 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/5cb2de64-cf5a-4c5f-bcfb-a7647a806f5e.json and https://artists.proofprofile.net/proofs/artist/5cb2de64-cf5a-4c5f-bcfb-a7647a806f5e.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 0x70b0774857b2c47f9f09c44f09093889aeab7c342ebaedc72d869afd309c6072. 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/FR9M20300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eae9eecc65542547c2a8bd704e2ee4e8661362c2bb3365f5f0497cc69d3fcc. 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/FR9M20300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ea50050cc06559a38369641bf07fe6203734fbb00656268bcad0d2c608087. 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/FR9M20300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd327ab3feb3a9d3ab377f5772bf515b0578715a1279a55aa7980a0bf399727a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9M20300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793cc452b8ba8fc572c0a5c53f2d0dcbc52a87f32536d3cdba6aa788b6b965e0. 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/FR9M20300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263e5fae7dd876dcfc27a3e5a658d6f7810d85cfedc404836ec48538fb1788e1. 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/FR9M20100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe8a6d864ab2c040cf81b2d54c6dd1ef46e388845164128707223bab68b6ff. 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/FR9M20300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5e99083ab96842ddfd1a2cccebdaf882e49a898cd73dc34ab59fdd2efed6d9. 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/FR9M20300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059a1d73d7c579679c2d92722c4eda7a279b59bdd468c21de6df36589faeb04. 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/FR9M21000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375e22efe74280d5b88bb51aa6bf539a6dfbb40b13698b098f707fff12693367. 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/FR9M20300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e234de7cd788bfe0329572f348508998051b824537f9e24a2224c404231ea53. 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/FR9M20300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345cba13be1c4850d61b9bc5c7c87f4b3f568e9202208579bdbf8b4221d30443. 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/FR9M20300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5396ced7a1575f1bf11f1a3cdff4e38747e15c9e20f2a6b0ce4359a573a931. 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/FR9M20300350.
Le Maquis presents: Residence 2002 (Online Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01e2fbdc1b1ddb796bbc6de9d70dbd32296fc480500cd21f203c31e9f51e1d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR9M20200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4557053d64f1ba337e1276d86487b7dfc8bb91e8cc6cb840b4abece89e1774cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR6V80200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32913bb2df03763683daacb99f047fa94c06ed5764b3d92a549d1228f49cd53. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9M20200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cdbe2bd19b7f34593f4e937b0b25d7810756fa54671bc07b8b2ae477029616. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES6760400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc26244f194bd14962fe6b1d6daf32daf667161d6c75bfd55011a533f146260. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SGA501213726.