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 0xfb7801d1f79d83e287c06fb21a861f482e8112a1f17507857e11de639327e917. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c21dd6e9-e4e1-42bc-b2ee-6212b7345886.json and https://artists.proofprofile.net/proofs/artist/c21dd6e9-e4e1-42bc-b2ee-6212b7345886.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 0x6f02205bc3cda71caef0535b4fa6b385cdf2855c0e603c207ff0940b0eb2f31a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/HUA251431801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890d8963b7d1134b42d600bf86eecbeb9cf44b7244da37fcf7bc003f17e076fc. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:56:03Z), 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/HUA251431802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72dbc69acd25430d13ba2fd8ea873a61051c4a9dd2eb22a548bcf885d03033a. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:19Z), 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/HUA251431803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b39ea1f59d13a3dad6d810b684eaa7db388f30f02ed34c792055ea80e386d39. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:20Z), 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/HUA251431805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce92a465a2064cd5a3f5b1720cc2b9ab8df55615878235afabc1e0871a15c0b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/HUA251431807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c89717da63413534bc7ca8476bb9c4de70d6adfcf8bd006013816542f38478. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/HUA251431808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c2dabdda1517d57a6f9b7bb6b0f753b0744b1cc11bb890fb2c467427f261c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/HUA251431810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4da29ca2bc1f8bfb3c4a2e9b9794ad971a27337e455f14ea3fc66b292cd8b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:40:34Z), 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/HUA251431811.