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 0xfaf39e54dcb5359579f2e786529f30b1f7f524ee7f6934b665b3d9798c6de0d3. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ec4a00-d356-4473-a1be-a53e8f6d67e8.json and https://artists.proofprofile.net/proofs/artist/a9ec4a00-d356-4473-a1be-a53e8f6d67e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Népzene a Kárpát-medencéből (Traditional village music from the Carpathian Basin)
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 0x1a7717a884c1907539ba16083823e94ea48e5662302bb48b7ca0cd6dedb00ff0. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/HUA231105106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0729e1674ef590f1246c99bbdb20dd2b4c840580e10a5a54b1fe4d1633750c5. 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/HUA231105109.
Szívből való muzsika (Népzene a Kárpát-Medencéből)
Barbócz Sanyi emlékére - Elek, Dél-Alföld
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c804c62275efafd88839e1e8b9dcaae87dc854634c448f537119dafafc3c461. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:30Z), 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/HUCEX2200030.