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 0x0f51b08d402465c5340dd712a7a4c024de501da1d2cddf1f3c913794e1d7cb66. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d2265d7-172e-4667-a3bb-719c1df300c0.json and https://artists.proofprofile.net/proofs/artist/9d2265d7-172e-4667-a3bb-719c1df300c0.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 0xaf484e45cc42eace45cd0afee647c15fe2edaca912db8061096d23dbae643b10. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:59:55Z), 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/QZK6L2280112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a8ddd919149bf12d465c053da904cf1a04f6f6fc47c3482c7a3f87bc773557. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZFYZ2389997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64ed31a8befbe9d9af0cd73b1451b3daef77e5a9e835bf84f4d9f7dc2428afb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:52Z), 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/QZTB32498819.
Pád A Výhra (Collection Of Unrelased Singles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b592ab25546341e0d5855a90d01cd94b275405f9197de35d5a51b54d64b721. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:29Z), 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/QZFZ62538271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce563f33e140b09fdc1dc22329824cd5c27b39c60a5fe934427867a0182dda4. 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/QZES52553992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d0377236402b679449291c79500407eca210980aabc48d3a3287c5db5a9ad2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22415335.