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 0xc1a916043dec70692a4100b753dd842f6cb8cb16626c518ad976a0540662ab4c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7e02d84-3bd8-4462-a055-8a6f94eb3129.json and https://artists.proofprofile.net/proofs/artist/b7e02d84-3bd8-4462-a055-8a6f94eb3129.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 0xa81e13c0b176fd3c6a911780f3e2ceb57ba30e9618f7921a2aa2f6c238dafdc9. 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/GX89G2509457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f29d7a0352e6028a48f7bff4b14404c8c8d52f4c624e3b8ae528c5f9934d148. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:41:39Z), 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/GX89G2547790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d41e38229c0d2541111ed4c8bd27054a14d5891b8d3a0ba66544d53d45c36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX89G2595342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c904d56c192e5c7802983c7bff5d6912374357d69b33180807bd791b23463c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX89G2596085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078a3e582d869d54b719e9387ad3809327fff945f27f9c3f9b871ed0eb51b2c8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX89G2531101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dfa2d64e6b9870bdaf5632b22a389dc8d0b5b6ea85f20b85b76318691235ea. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:14:16Z), 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/GX89G2510683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78664eca6b34a2c38c82cb15e12b495856bbd40dd4a07569a21518050dcf514f. 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/GX89G2525122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c9e73308a26668015f5c8f10828b749653988dc34fb509445949d4b3b6ace. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX89G2580960.