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 0x361428984e3f233cf83fbf8b8d30112341971dd837f6feca391b2a2add06aaf4. 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/ff90785e-5876-49cc-92c6-5652996fad95.json and https://artists.proofprofile.net/proofs/artist/ff90785e-5876-49cc-92c6-5652996fad95.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 0x45fb45da24b9a241bff8760b9e6330df6c5070295809a30da9a9da071e7b86c7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZWFR2486012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9474f351e20923a705eda16ea146983f97954d9cd7a4601a6f4e597491073537. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFR2486013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85450520dcf76aa421501e99a2316dd87e041fb8a80379755dbf105950db351. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTAX2498134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029289a818946bd1717c76015dad31ba2f053c135b216c80fa3cae3864d0b44. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:21Z), 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/QZTB52440728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234af09baa351bf2329d0831b6cdcbb7e0b7df669dca12180b10bac5f93ec525. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFR2486014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74457bb8241e225ce7ea71db485c1609f11ef884cc1373d73c25eff843800339. 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/QZWFT2467072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41621234be7b793f6489e4cf4498103cab6da33e7964f509a70b9d1788724b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFR2486016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72827632ca8b65a663427078596e85b98017418b1bd21fdb30005bfe53ebf04a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFT2467074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006b523ec35581e1076f49fa7b664f3d3c71407186b43ce2b91d920648e6bc5f. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZTB92450073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c510aed9d45e18f346832cf39af5c56fac3a308d2cd75e6d8c9fc379a5fdf3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:53:38Z), 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/QZWFT2467075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145a6cafd0033c2aac2f61ed376ae738c501daed72360414901bdcdbdfe3f82. 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/FRX282525075.