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 0x5ca67c2b6db628357c2c914a5502e64947b1507ab42332ad705fa7b418a453e2. 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/64f62cb0-5169-4ba0-9799-3da50f3c05b6.json and https://artists.proofprofile.net/proofs/artist/64f62cb0-5169-4ba0-9799-3da50f3c05b6.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 0x015c99cd9c8bd2d3ba4ab42da9bfb66926c3480588c2816563f654b92b0eb559. 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/QZNB82447125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d08bb1294b429b6ef448667e2e754475768c336141ba0e64ddaf2389cc6f63. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWW2445613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68344db20d4b59313657d79972d3e2c651f74c2143e1f604f35d1a9f3579ee5f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWW2445614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de0e13890d9853254726d846a769287140003cfdfdfc5607f909f2c7d243027. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWW2445615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329a65851bdd39d819bfe50d6bbe6974f8aa69110a6f0d8e55632b5aee7021c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWU2418944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ea85a62b99b07c78d772969b447f42bdb436e4b1e44ab7da4c4c62d832a7c5. 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/QZNWW2445616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658fc31943d337d72c8be9830502be23302b74840de5dcefb5f20857a771ba60. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWW2445617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159622550470730dc8c714d10d85cdb9f35e736e7390485bdfa140e15bff72e5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWW2445618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a04f31bf9dc2ea05c604ccfa163beb038c102826fa416ffa0b3a16219fd4b3. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZNWW2445619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2df139eeeede1c186ed8a65305e76a1d9708d2d518adb181038e53cc374b953. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWW2445620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b46500b03da4b3e8c604bbde56540c6587337bbe218a7ca3dd9c3b9d4361605. 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/QZNWW2445621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6106d5e01b612c7fdcba84b14ade76436e661c38ea58901c8b6c3d1b340eab40. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:39:04Z), 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/QZNWW2445622.