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 0x78a3312ec91767071f6e0944270725ed0842a55127ea899d226629b0539dc7e5. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4dd45b7-f1c1-43ff-89a2-84e931c46266.json and https://artists.proofprofile.net/proofs/artist/a4dd45b7-f1c1-43ff-89a2-84e931c46266.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 0x12ba3077a9454fc293d8bbda9a5bc44a51d94aec1375f385d98010b1de396cf1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:57:57Z), 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/QZMHL2414043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0650d03ff7bf1ab8898f1c3a7e1702995fad33834b53a6694d466bae58a887. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:47:36Z), 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/QZS672409729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb114c6522ee55a3649f291c4d4d9813b6e65061b76fc51f0a9e7dd985e7ebe85. 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/QZS642481974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5013fa2e5d66156c1a6300df32426b8fc5f679eae6b691ec255f0c86ff281a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMHN2454668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c56488b5da69582fbe33cb7fa7c8fd3a69b65e6f85a091d7c17eac4ebaa8c62. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM42K2470427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e221989ae3d015501f04b203d7b487d3c57d5ea759098d396024271e2a829. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS632420267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60b0a16fd648f4821a5d3c508c45ee9a9311546b74832969bc4915b3eeefc52. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS652448023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a132e80719605419dec65b7c2b7b307588013ca6af4e83f5ec53a3a2719085. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZS672434326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde0852874907fc669385ff652ac02759d0f452bd6ea53cb4bdc78bb7169a9b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHP2416793.