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 0x35c9d2256ed49017320ce87083b00bbdca392d76bc8c9503f05c05e569b6cc4a. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5772845-61c0-4471-9f9f-cac5bb39a746.json and https://artists.proofprofile.net/proofs/artist/c5772845-61c0-4471-9f9f-cac5bb39a746.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 0x6f0c3867c87ee84a86ec885e579d1dd6940bae20606b51ed9631a86691468e7a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:30:57Z), 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/GBWUL2299141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9482b9765af78e18bf7a163479bb7afab0f8c2a7cbb5134dd83706bbe1d77c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:39:11Z), 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/GBRBN2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2478be189a5ac68883cbd327887603f916921ddd137a3a3c0e65cd824ef985c0. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GBRBN2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f7e5317a40bd5d7103435d9758b5bca548de19dde9ee9d74cd9f6e0f120b8f. 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/QZPLR2440921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8ac2075077f91a5dd8632632e94fd9cdf5be862c6afc8c6a302c78aff0fda0. 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/GBKQU2468090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568f6768295f748f979293a8c0cf30c66d8528236ea266c95aa344216d6dd6b2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:20:48Z), 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/QZHNA2572079.