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 0xcd573dc7d46074d3d48d2773c5e808d0b73f4d6994d60f89847b8e2dc35e7c60. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc36e630-1dc0-46df-8427-9ba0686d5535.json and https://artists.proofprofile.net/proofs/artist/fc36e630-1dc0-46df-8427-9ba0686d5535.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 0xa56a86ace330d92ff6a5ba3f85cad5987335921233e1e3fd12f4143bfa904497. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:35:54Z), 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/USHM21602979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098ce26557afa2d8d9967cba74869ae1779e70189a3aff44962751653c009bd. 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/USHM21602982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b207826ff2c25ec41b53d34036933542e864ff62d12f9a46d3223704c9fc16. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM21602983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f6fe8a85dc7236a49759af9c3a2ec0e601868ab4c8746371371868363229e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:10:11Z), 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/USHM21602984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a24e291f8bc4a6912166a69cc0f8d347266fafa336bbfb631172f25920935e8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:10:48Z), 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/USHM21602986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfe1f5cf562134f2ca47d9e9b76524240b643265b5511db224ab8f086b8d1f1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21602987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc567d3bbc1e58af285c4b2e6b8cc50c45bee0bdf21b6cc01a8a541227f9130. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:51:58Z), 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/USHM21602988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfabefe4bbec72b8630dd338fadf6f5835c35b210762a9db05b5a05a22e48796. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM21602989.