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 0x70af8ad0530f4ef120deb78bac5968613d0b67ac16a7d9f273eeb534398c38e5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a20e9da6-1adf-49d5-ba3b-c67b2ce652ad.json and https://artists.proofprofile.net/proofs/artist/a20e9da6-1adf-49d5-ba3b-c67b2ce652ad.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 0x6bfba5d79f105cb1004d9e7667d76e3b44f2d600c497937689107dd7f3f2895f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2130285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d617d23903d9a020277573d040cce267f41b6bf39ee613ce20f930bf464595. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWT2130287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40984aa54c73dbd6e6e444324c1711e514e173474d497e3e793f022abbde194. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWT2130288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980c2ca62832163bab1712c7aabdf66e9fa2f58f9b41dcc2bcf43df59b9b953c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:08Z), 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/QZNWT2130289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa631832609f45e21aad739035dd7e74549ec35d1e954774d36534e74b04c03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2130290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed831326e5d9f052e6f96b58145b4c2237dde701bcd54bac5f060c64883008a. 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/QZTAS2144799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ecf0fdc90e44f21b9102b1556ecc71b5663c7030a4a2bf1a365475cc4e1563. 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/QZFZ42432205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ce64d509873ce5f661e1023b040bbf583248673120fb8a88f7ee92bbb45ae. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFZ72478844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1728bc59734c271a80431cf43c20c8012bd580c6015f2d2d6fc3ec18f700637. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA72426203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d423f13a9085e77b4d952b21521f461e4cb3bb87c0ca05c48d9d0b88b5c638c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN32439301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80fd69cd1d2dfb0e04d602444791d9946bce6ab377160842c96614c2fd18c7f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN32439073.