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 0xb798cc4633bcfb3b3015a5fd2f16e9b03ab926df880db5683995acc3c7e19ea3. 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/698be032-c5c6-4dc1-bcaa-7b1f3c34d28b.json and https://artists.proofprofile.net/proofs/artist/698be032-c5c6-4dc1-bcaa-7b1f3c34d28b.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 0xbf3ee027a8bf29d4a3b766b28b4d060cafa7416f6029e1becfd7665acdfd9465. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HUB872000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6421dfa2ff3bbbf9afa66fe2db673c7ba8d9b290c611d7d9291d4dd3925ac07d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HUB872000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dafadfb56316f10bd4a752e946e14ef4e41ac80f2b38e376eafe8dba14080a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HUB872100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448f15b559e2890df3f36c15fc842375007ac79c0b38ee3c2e552329a599728. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:15Z), 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/HUB872100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5f62d8f14f837b6a8a7a445bcce45030394640d19b97946125de10e2581862. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUB872200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d162be1ed5cfcecb270c7ac7f650ebc522b9952c835f7eff18bb9fa2b7a413. 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/HUB872344442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c12e1f210bab893cdaa301aa9b65090915fb99f57062d9ac9c6adb4a1e69b65. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:24Z), 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/DGA0M2370946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f5a34e5d3b6b47bfa3f05f6188f0ede6663eaeeae2acd426ad595e1c469fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0T2465128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff6c9efdf6025d640af9032539b5738e83bb32faf1ba8a88a7e962149e82dd. 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/FR96X2546570.