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 0x21fbaa3229074b26ca42ca66a91f6cc8c078336f35295cf075ba020112f5f510. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a96d78f-4a69-4527-9ba6-63d605bc716e.json and https://artists.proofprofile.net/proofs/artist/7a96d78f-4a69-4527-9ba6-63d605bc716e.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 0x25c93450672c7341da8289108c4f6eac8b2e20bd6dab992a8abe0463fc94cec0. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:45:17Z), 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/QZHZ52130688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e07cff32075046490e7737ac152dae1b55bbb79b545748f0c11a69907099bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ52130686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810caeed6ba4c953e91b2eee62d7ec1b8b55282d9eb3b045ebc03606d078d02. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ52130690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd64830f7ec8a0325999d38d73dfdcbff9601ee874629e822c87803cfdcdc5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLM2394401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5641a156ea53b52bb8917a3e9908ac454bf452a2f21b9d8e9fdd7c90fded8472. 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/QZGLS2326463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a8b250a92e0454475f331e5e87908fab8bf0c4a0a76ae60dce68c7df1b81aa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNA2535967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384b7ecc385d8e3ab9eda17f62497cd9d9f44323fa5bf0f73886e0cd1d7dfe00. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:17Z), 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/QZK6Q2590420.