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 0xea602c6a3f2a04893c95c3f71355e22f20a84a1e6a8ed1c55352ae574543cf91. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e58aa62f-e938-430f-9fcf-39d88cc3aa6e.json and https://artists.proofprofile.net/proofs/artist/e58aa62f-e938-430f-9fcf-39d88cc3aa6e.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 0xe1f7809cd45907852c871f9381e6c5fdd9b43f96cad83fb3fac5ccb4355539a3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:51Z), 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/QZWFL2325689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ff3a21f67fa99148b9e01e3c5b4cb10d5ffb65f5b579ab18b38c556872069. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFL2325690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c3df53c8bf5ab1c28e8db5e18b55e4db0e05722daab6200957ae4f2775a74a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:45Z), 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/QZWFL2325691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad0d48dc329ae847a7aa2b9b8cc282ee26555afa4f4711c1599de28a497707. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:32:19Z), 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/QZWFL2325692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f6ced2e961ccfc10d0e7f3d5331d77c087147f7a0c28a3d30db734532b35b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZWFL2325693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb590c5953273d3cd334f5821ea71ee30685f85ccab51751c5508c67636a24ff. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFL2325694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9f806dc49ee448ee372f59ab10c46a1bd3ba0295aadf9cfe3facfced3e501e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:01:29Z), 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/QZZ7N2416823.