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 0xa6422ced9659eb89a0bf13d4e7b8768d95a80414123898768591c5dd05a4725f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aa61316-fc8d-44a3-ba37-22192c03af26.json and https://artists.proofprofile.net/proofs/artist/9aa61316-fc8d-44a3-ba37-22192c03af26.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 0x83bcbdd1af468c9732c201c15f26c4c071914637caed6354c542ab46b7e4bb57. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NOCTH1837020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfddcbb65f052cfd3c4b3f2c0ba229490e1b27eac58b1ed9da8fd59db9c53b8a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NOCTH1837050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34278243340f6e4671df88a16dd82f60945a58a081cd244241ca7100fd31ab6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NOCTH1837080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd7f8e41bd9a593b9348bc84e5cc7e2732a852434cfaae5740576aa3c3c4afa. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/NOCTH2184110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67441ae286ffa95fb5e61c9845fd22c29b2363f96f5f0b4187ec9bb0e8986d57. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:08:45Z), 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/NOCTH2184020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d5fe88a736f5f4b1590aa06c92e0a2e00731ce4b6947dc046edf0c234f72e. 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/NOCTH2184070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea781dad339c510f262beeed947676029b825e13c932dddb28716995b2332ad4. 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/NOCTH2184080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b7bd2f7c7d3e597481c7516284798520cd04c8f1bcc477814c6fee4d854eb. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/NOCTH2184090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa4cdf3f23a9b8aedef67d20ca2c3381ffbada034d0423aba26158be21f0164. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:43:52Z), 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/QM6MZ2483577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506a34837df39375f69410b213d1a527b7f82fda0c4440c4ec022b4df2f9762. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:44:42Z), 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/QM7282479743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913fa38a82da36122154851b26a081c6d1a16fcfa9b92d56fba64dfcf018c475. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM7282479744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c6df1565b287a40785e2b136a7c3b7a5b79e027db80ac3647db927a8714d19. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM7282479745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f3d75dbc22e1bbac5e382bb7ffa4576d074ad7832922ce7fcbff247c8295c. 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/QM6N22496773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc925a638b99a31ef176ccf69a3c9b0b127e3940076688288199cb825e2b7dfd9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM7282479748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc3da91185bdc151eaf9b86ff66f5de80b952683c62fa4dcd8528e8224617f1. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QM7282479749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b17a37cdece9564e296859cd7a90d6e1c4866e9c222de088b7be6424572fc2. 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/QM7282479750.