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 0x134c32212ae5d39da833183cb7a04b0467d76c201de8d32213b41b9505d00ed8. 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/c284e451-921f-461c-95e4-280009ea992a.json and https://artists.proofprofile.net/proofs/artist/c284e451-921f-461c-95e4-280009ea992a.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 0x520610aa772fb499c40de4cae9c7fb2e4c7139f48e9b2d58886b8fdcc41e5068. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUAGV2406227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc941326898f27c0f5a5753b76363fee126ff8223d083866d99c195beebc2890. 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/RUAGV2407646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa3205ac483ae8b6096c570f8db13c91d2e6198d337a5fa8019d2e3df1df07b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RUAGV2410631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdde740868af8591bbe1a4143e531976fd9ecad8907b251238d2b882e955ab38. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:39:24Z), 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/RUAGV2502008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd67acbff27ad246bbba8aa5ca79b2c49f4e11322f9e5f3bd63f340658fcf187. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:20:26Z), 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/RUAGV2505362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd8912789b85fbc6cdd6ef9eb802ceacd7c55a8cd2f7ef7d5c1ff863c9cd38. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:15Z), 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/RUAGV2515495.