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 0xe66c7296f7fa013bb2f021be6be2b5dc795f0e1088d2229ae7be51ec625ee30f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae7f59e8-e047-42a1-a054-f9832f4a033b.json and https://artists.proofprofile.net/proofs/artist/ae7f59e8-e047-42a1-a054-f9832f4a033b.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 0x6e01536f192dc4b771765c3693e7702b8179f45c1ef2536ccbcb963e2d5b60b0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CA5KR2222297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cee1c0c1588bc051f0e79c15015a991b922181585936cda273bd396a58d11c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CA5KR2222299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a6ffdcb0f86faa01b50aa6b5b945318e68526d0822a59a2822857eee90a86. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:49:58Z), 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/CA5KR2222300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d933c7d67a43591898ed553250ffa9f3e9f04c5cc7e9dec0069bdf1e166072. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:55Z), 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/CA5KR2222301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a16193a7810417829f5cb03df8aafd3fb30a1b78a1d5195100505381eb16a22. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CA5KR2222302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d254d573672514177f8c96b79d61582a3d8060b237e8fe1dd676b8616b82db. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CA5KR2222303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f41b62641dbf4f5c84227041ee628b93be09f55dbd5dea97f1665198b0e0a. 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/CA5KR2222305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31171b3e232215ad5e73bf6d08e15aaf603dd3db404033d04b4bb8e7df850de6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE6SA2208027.