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 0x8b611489aba5b2042506e5a0f5a4d83a82ca97dc4b487a12933d83c61ce84574. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d742b5bc-4041-41eb-adbb-42ea958938d4.json and https://artists.proofprofile.net/proofs/artist/d742b5bc-4041-41eb-adbb-42ea958938d4.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 0x364d38a217d30284b011c933da9d7ce12292d680f5612bb457f4c010eef47470. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM7282367813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5548d20779f6fd3124c168ef5b054cc9614c4d866624b99dc2a7b63c8b5dd97. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:19Z), 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/ES6110463102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2514ab575c4f304220f1f43c8ff30f3f89880b6d637a7d6dd3c62625b25a1490. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES6110463106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32b731e2ef4acbf17b0497f2692ef5c00e7e0d516a67ed4725a2e1c781c8fd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES6110564503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46ae1f10f3509eead32b10af2ec4db0b91b1cfba15046bb9e3360cc8d76b59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES6110564509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a7184f262957f4218d23e5a5d57ed97a1fc1a94121a36c92f118bba8c048a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QM7282367904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed29f007d63247ab05095155801ed425d41a2f092222ca4c652af4c378e5c7c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:57Z), 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/QM7282367905.