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 0x2ca324692894ab924bd6947e6233fbc1948c938162839ae5795b47814b8778af. 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/d6b49635-9ccb-45bd-bb0e-0b8728404300.json and https://artists.proofprofile.net/proofs/artist/d6b49635-9ccb-45bd-bb0e-0b8728404300.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 0x3b44104465490617c3ceb9492cf56a49721f3c08651f9c1a1b3987d41055b1d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91773211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda972221351cf181a54f14e80d6568718f9f95cfe6d06e6253661179ab19dc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:20Z), 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/USLD91773213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f9d425060f73b147fa44a7c1fc2f9970d040ab9e28ec20abf38ebea9406ca6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USLD91776284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be7d94ea1c17d4b4bea6076be1f3a5f3f741d1186b07c4545d8fe2540a5143a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:48Z), 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/USLD91775283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4254fdae8dbe20e6c41675be6d803c07c17c71b47f2e8dec908e8e3b206f2667. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:53Z), 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/USLD91776287.