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 0xed98d1692554db73800462fc6004a8d41d25de44c8e96dc3e8f2b4ca9066f545. 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/d07e8b17-cc8b-4c77-a8bd-2f3c694b23a2.json and https://artists.proofprofile.net/proofs/artist/d07e8b17-cc8b-4c77-a8bd-2f3c694b23a2.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 0xe03f51c6e33ac738616aa28032518a1c6ce3e00201e48dfad29ae76102dc9799. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:23Z), 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/QZES61960733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84be8ea414eac00c39b08a3236310344e3394b99a8099261f3a6d82aca16f56e. 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/AUXN21812724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ea6a24fee73eb0c7ba6f0eb19a9cc950de21f09ddab88cf3480b89956b82a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA092470568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bd65b887c3e42123a0cf77a59735b63ac5174d8c42c7e9c1fdf70f125e110. 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/QMDA72458803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781bd65b887c3e42123a0cf77a59735b63ac5174d8c42c7e9c1fdf70f125e110. 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/QMDA72458803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47807f31ccc2c5fad12574f69c4198901b745d01f001f1a4b11a6453c7da376. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZK6J2556554.