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 0xd8d535d14d45c8b71cd468a9ad73f7c13dfba3cd2f16963dd1730d04976042ed. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15490ae3-d1be-4d5d-b15f-94551c83beaa.json and https://artists.proofprofile.net/proofs/artist/15490ae3-d1be-4d5d-b15f-94551c83beaa.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 0x96b43cbea0f5f0dbf0b9f7fff96c1ec557b3761ca8ba31905edf92ed16b7f02d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:06Z), 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/GBRKQ2556074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02fbe2f6748c87c9829b20d69d3ae7e2845db0897226d3780753756b20a5f28. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:09Z), 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/QZTRX2581701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2859ad3737bbefe4b1354520f849b5ddb05198d59252c2cea1992935b6dd1189. 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/QZTRX2581714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e033b36f140012ab6b29cf8566dce4cd5727f672eda5a8e9164c0163371541. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTRX2581723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc546eac10530bdf1d36810821882effa005afff8d201636a7badadb6a1f589e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTRX2581773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5e0ef122f316238d92d2a88e4eef4f462d06cdc8cc889d810a2616f9b3581d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:30:17Z), 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/QZTRX2581784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc9647ccab03ea31b154f89d69300017b4c23dfaba9f5961ab3d7a12567ee0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:24Z), 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/QZTRX2581790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b43cbea0f5f0dbf0b9f7fff96c1ec557b3761ca8ba31905edf92ed16b7f02d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GBRKQ2556074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166b6bddfa2525ec5536563f57875dfb70693696d557fff825db6c90d626c28e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTRX2581857.