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 0x22700ace5a2ea50e6ca64a4b8c0958e4d84385a6e9e8da5dcd4386b4585dd8af. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5dbe066-f7cc-4f79-912a-28147bd99541.json and https://artists.proofprofile.net/proofs/artist/e5dbe066-f7cc-4f79-912a-28147bd99541.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 0x1ad7a7a3d3e30aaf4294d82ca205318c13fb41892972aa0d2d9322eb09a64f6c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPEW2510795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f211dc6ee9e26637ec7ca0ffd40232830514e5ba1e90f3809d6644866d2ce06. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:56:13Z), 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/QZPEW2510796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4789d9bd096c39cce63bb6933fe0467ca5f71ed24bac901120efc4b6e95f154c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:44Z), 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/QZPEW2510797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbf5b846d926f8dc89517bc20b2042d569c44832d5f19099a6da80106c2551. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:05Z), 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/QZPEW2510798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed0eda1cfa10c625072609f3b138742140cf7eb4111489b535ddc6311e479b9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:22Z), 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/QZPEW2510799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eea4ff67f6920358dcacdfbaf4571922c653d8bb93889da03db14ebe825c09e. 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/QZPEW2510800.