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 0xcea69687329874d1e707c2ea90311919a72d536b8f3abff8a7878ded6a411d82. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90fb0c9c-f7ed-4045-8bbb-efc7b3333adb.json and https://artists.proofprofile.net/proofs/artist/90fb0c9c-f7ed-4045-8bbb-efc7b3333adb.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 0x4794eb199a6799d804b1dfcf6052adb6ebb70b74aa5a0305748cdd1136bf2aca. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJV2582108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5276149d95c6796684428d6389443996d87678b55d526cfb3b1311b1b6cbc2. 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/QZNJV2584395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7297ec4c96e2f4a7acb09338aeccfd6cb5863753e795cae78ca0c23a1153c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2582094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119aa8f306fd256f77432b99e255349521c561d05f3fe6a1c971da34a5c0cc23. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJV2582109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6912ea01defcb8a426d4c72e5842bcf2a5d7d9c521d840be491bb5edf0884c3b. 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/QZNJV2582111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365fca45608930aad66bf720f1adc5cb322e40f27b12f5ede5da8649afcfe339. 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/QZNJV2584472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9130bc8902437b55733574f6446f89b5d3251f157859007919f704dc6aa6bab. 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/QZNJV2584407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf7b8345f5e20654bbb9b822619b9551bda9f745eda3536ec73ab657bc9172. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2584426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141c239d623e9d2233ff646a79005ff87c5eec26939be8a57c72031f0f00615d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJV2593448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95decff9d30e537c7028fab20601112f902f3fb9073940c54f6cfda4cbb93de8. 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/QZNJX2547076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85143184784a4601beea057dd49774d5a57906e07d152d98a5aa369586d86f3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:48:48Z), 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/QZNJV2582110.