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 0xe61752ddb56191828ddd63739a7e02b2018939897644c97960a166fd2117d01c. 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/8d5aa2ce-ef5e-436f-abd9-3de99528cdc3.json and https://artists.proofprofile.net/proofs/artist/8d5aa2ce-ef5e-436f-abd9-3de99528cdc3.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 0x84461dcd7eb7aa1a81e0d1edf830d9a6a45abf765094ca8a976c63a2bcae3945. 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/TCJPW2397331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c075a8a17509d2be526613b93614f04a8920a7bf7624c7afeddd7cc7dbef36. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCJPW2397349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b13bd5f61dda410f11130f4f654afb69afa5e62ea7b65b727dff545eb4b5715. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:33Z), 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/TCJPX2301568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f41078265fb80ad00ea9d464e38aabdb427e20ddedb2bbdda339cc668e1239. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPX2301577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2bc1f7eec4d30dc6823dfd0581ec4322c3fdd725562b64bf15fe1b1968fcff. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPX2301582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a186c2bb93da292492cfab36f26e712615ed78fa5aa5d806d9b4c6e3941b777. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCJPX2301589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f004436b53d1ab8d232fe40f5020a98189fd35a5cf46444b0f4e966afba421. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:37Z), 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/TCJPX2301602.