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 0x33daf48c51feea58c1df75ee695eab6848814f2d8339ac5926bcab2d967e07fc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a203f81-4fc6-43ae-b31f-2f50b166bdb0.json and https://artists.proofprofile.net/proofs/artist/8a203f81-4fc6-43ae-b31f-2f50b166bdb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Trap Beat (Freestyle Guitar Type Beat)
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 0x5fdf430729cdf7f76235e53c55bc357d1edaa76bf80ee9d1647f9c65c5a7019f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZNWR2342735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90290cd9baba1b95991ab202fae92cdf12a49f8d242e5aafd5e4155bb9774d6a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEP2538243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab0f987aec7f295d4ad4670b43b8245afa11614f1d2c4f223b25f510f275968. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMER2505980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872b99246f5e754a1eff1cb162f58ec9853ae613922154e7c4919063df909c34. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWT2533463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd813a2c1f7fc1ad78d42817a332de33ea19b75dc2fe5b422c4fbe7c4618eeb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:53Z), 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/QZNWZ2591545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461fc6d69c9b85dd2c1856380147304978165787f1852f5ff9b7f48a323d39f4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB32560792.