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 0x9bc42704314ac9e133ecd7001589dfc2d01dd637917887d1a233537461c745ff. 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/81921c24-52b6-484f-b55f-332ae7479f73.json and https://artists.proofprofile.net/proofs/artist/81921c24-52b6-484f-b55f-332ae7479f73.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 0xb368a2aaddad1c70570afc624adbe189719cb887ceb10dd3ac7e9e5ae004c6e4. 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/USUYG1099912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7fd1fd6f4e924b8f715dcbc974f219c1e36016bcd89ef8539f2333c0c29b6. 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/USAE81051039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d5ad45d705105a9b69f6e7cd44e0d2c3e80c91fa1f5b159807004ad6d1003f. 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/USUYG1099905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cac6b7893e380da0393f063492cf500f855a7ba1b9d7b7f5f998ac8c7b4a8a. 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/USUYG1099916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec46e68415f81f827015413ab17f36f0541366888e765453ea79d867815a1c3. 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/USUYG1099911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c592a4e1d3d14aafe437f322d48cf9b5e6d06ce6044415969a7823143c4e42. 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/USUYG1099906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd18a30f4ff8b34fd1fc523dba4fe6ab7d96bf5c952402e47ffcbcc10e88e6c. 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/USUYG1099909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad76b31896b3b29a89fe8857a8dd5124a20edfe2f598d587995b89ea5d53546. 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/USUYG1099907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefba471ea13a7b95422a49001f28fa88da600aa9ae2c58eec520710cb4bade5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USUYG1100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabedfb11975eae795b4a453f315df08f842b3056967e22d6ba87ea5f784bf7e. 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/USUYG1099914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f278a6c3e10f5ef61267e0c9da7de93b4783fcdf3c70fbe7a2579ebe6baef96. 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/USUYG1099917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2fe14a34d87d0bc00b2828e197fe9e7e8ea4eb6f36ca2ee03495fd07e87ab4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1099903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808865538dd2edba21f1097d4e091c9eda7aba68350ad7c644e5ee66ddcf6cf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUYG1099910.