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 0x479e1a0234bd8a73e5a58d1a0e1b86da309fc3cd0c8f42b8dbded6646ea7c220. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b87f30d5-2a7e-4149-a06f-280d6061a720.json and https://artists.proofprofile.net/proofs/artist/b87f30d5-2a7e-4149-a06f-280d6061a720.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 0xe44eaf4fbf219b0da803af192c4b383e539b67f7c8aa620b13dca1106d6a8b35. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:51:59Z), 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/QZWFM2378415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f999e2c9e80edeb9551426141da13c12051774e17ad469682df4bd53af9f73. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN82409104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d7e293a39f38d7eb4783a278849eebe404a227a310488c75b0a21730b996eb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZZ7S2420189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44eaf4fbf219b0da803af192c4b383e539b67f7c8aa620b13dca1106d6a8b35. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:50:59Z), 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/QZWFM2378415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd7f50a4d0c0a5bc92012777193179c7ac0e24bb8bd192860a661aa9c634e67. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:48:41Z), 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/QZZ7S2420190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8677a8be3f4c5dd265fe9f8b159b3dcf936ed8337e314614fc8c46c0d37d41b2. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USX9P2534433.