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 0xba6a298346b5e467419200c6e910063ad93d89ccfacc2483eb9aa620883cd90c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40385bb3-fcc1-4651-a2ab-0443bce6741a.json and https://artists.proofprofile.net/proofs/artist/40385bb3-fcc1-4651-a2ab-0443bce6741a.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 0xee99568c3b3ac95becda1e320f077771baeb7a04e04b668b63f52cfd82985a5a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCJPP2116436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd706dadd822745dc839c01d4c9c124ef5135ec090c502cb12b4d578949cb54e5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:41Z), 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/TCJPP2116438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334c05dba79dc6cf846559dae3ad7b761e9ddef01055869159b8e0d4502b3cd7. 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/TCJPQ2133225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe520fba587daeded93314b53b711c7113a99335a66f06b362cc9dc3728d2d8a7. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCJPB2439303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f3edc99373022c7a4222cf891be655724ba94fe2f85cd030d5eb8013f2732f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:36Z), 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/TCJPB2439317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ead12cbeed1214903a9f22397e5aae16d5c4443acd42ff460104d6c33eb53. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:04:06Z), 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/TCJPH2590449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5834b818d62d3aa23f1484b5880ae47b393ea697c666f8fb1f63965428bfee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JP92J2401856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24459519a861aa2fd2dd4830fa799c714b6128ae073871fb7e0404cbfb83ace3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JP92J2401867.