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 0x28d40f9e13d80c0d919feaf9917afa51f0862e9c24f707326d4052aec319b426. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/989751e5-1bde-4896-85a1-77062b26e174.json and https://artists.proofprofile.net/proofs/artist/989751e5-1bde-4896-85a1-77062b26e174.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 0x33a3a2d73e8b1377d2f45173706d8998724b9f5f2214553232ad819948efa5da. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES17E2401961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca93d01b2af4821b999379ee8787fd2a8f986c53fdc02bc93eef5877ff5398. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES17E2401979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067bcb2999bec33f7f0d44cbd1593a0ea7998f04ed18ddf1702946b2ba5c17e1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES17E2502052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27e24b93ec9cbf61b5a2b4bb47ca2dea74bd420064e57052c13d1be9ffb240d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:17Z), 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/ES17E2502050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df6efc9370b1b52b3705e41b4e197c4f3ab2a1a013c125590dba767dc6659fa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES17E2502051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd678ab48306fc2b5aa71a387c8d4bc78969aa7253bfeff13a69cc5f028d1a18e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:18:33Z), 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/ES17E2502049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f30a0d96f6c01e5261cfcc7267c20935c679a1af84965c0303d561949a78a2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES17E2502093.