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 0x3a6be88a552d518df64d6de8d5881116c56fe2b9b028b349efceed1622224b2c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3877869a-e854-4bd1-a22a-86f01648dcc1.json and https://artists.proofprofile.net/proofs/artist/3877869a-e854-4bd1-a22a-86f01648dcc1.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 0xaf5f5126f51bdf81a10d19834eb99c53c93db961895214fdecccc8c53823c279. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:23Z), 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/DEU672400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f586ac196f153ca45afae1446805e74343d5b4299621937d0b9233681f2031. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:01Z), 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/DEU672400568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641751be24ed67e142590e00365281272daffeacfccec40d1f94b0d0a368ec35. 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/DEU672400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce73fdd833f457b06e207a0f46c6a0b373022ca44fe3d8239fca350c02a58969. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:37Z), 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/DEU672400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc17174fdc9912b77e80f7acaf6244233857a1396438e605d7184f8c493b39. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DEU672400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f4b56d8a7b72e97234f6104f0bc5209e302041effe0748e522c3ef7e09ab73. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEU672400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0957105b61c47560e43c6c5dee805d12e0d5ff579345777ee7bc93c471d8a89. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2031986.