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 0x82bd257676517be2874c408daaacc68725b567520ce09f65fd377faf4fd49642. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ac89634-cb26-47f5-83b0-5c0f4cc90430.json and https://artists.proofprofile.net/proofs/artist/3ac89634-cb26-47f5-83b0-5c0f4cc90430.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 0xa9efab7bde5f86609df5442972a3f004fe8daa8f7a6d207a1c8fe3767c28294c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAEL1981407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d169a132d71c151b59516fd323fd7192267d746fb05616c025f14c838a6c1b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:39Z), 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/NLFL91100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c8c16b25a06468a6a7274e3b66f3a81b859f4ddd6aa0cb4f99a039a43e594d. 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/NLFL91100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93fa2a290ccf57ea5be4750895d75692a7c377aef764245152ef5eadc22af62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:59Z), 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/NLFL91100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e6d1d5e58f838adbce13442bc5ca7446507dcbdb152e42ae2a238d2c4b01e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLFL91100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4613602f311e681be95cb9543026c45b1e51c048db485bc43b20662a0c7855. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:05Z), 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/TCACR1677101.