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 0x88e5a41b4d5b33b291aaf86887871d033f3d6624eaced794009852acad0672ce. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/811a2b5e-6a10-4f87-bc2e-2cd9b5ed0983.json and https://artists.proofprofile.net/proofs/artist/811a2b5e-6a10-4f87-bc2e-2cd9b5ed0983.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 0xb2266d66e5f53218491143b8489bc57786ecc36967692c9f4d1811d65d48cbcd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZS652465741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed68f50fde5eb7e55c1c20ae33c944ba238e9fa206182b26a611a09a54c84ed. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS642425959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2887a149cd138a7479d3fd4310d0c7a7f461169fb69016eb22948f492282e. 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/QZMHL2499087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c443e8a5ef96c4e248d4a2aa3656a0c63cd0e2b7e8edb7d767d6bce858cab7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZMHN2401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f85a5c7466570b30cb1a62668ef16637f591001de71e7662bb2931e822d24. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZS672475698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54836374ed489a0acd3413a458592fcd9f6e1acea2140b61b1098ef11ac719b5. 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/QZMHK2498802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f910160ee2fc14b15575b46203057434c377c9b466a54e5f238d61ba9146e99. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:58Z), 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/QM42K2461771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc612a01d5a5720a15ff8ac5d8daa94b4d76d5a7f3afd78303c649cfa8e37f80. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:04:18Z), 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/QZMHM2458928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ec29612fec7223b1261004a7d85482f442008ff103f64bd0eed04e3d68d010. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHN2479941.