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 0xedbc41309b39686241d385103dd29c4abb1b7985317055033460aa4c27121ce4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d83cd92e-4e27-4c5d-bb46-b28ac329e811.json and https://artists.proofprofile.net/proofs/artist/d83cd92e-4e27-4c5d-bb46-b28ac329e811.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 0xe11546e8b26b3b84d9acf84ba362791fd97a5271e865696677bc01f3ccf6836f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:25:35Z), 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/USDY41739625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec3cc9142bed52356c768dd71e68df23e681c23fe2d63b8ab7436dae035e879. 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/USCGH2096592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ea69842fcb6c9d9e9dbce47f205a176ab8e2ebb4a4e9afc95d77c404afb0d3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHNB2029843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75553922383f5b1854fdb70e2fc66a8bd6274b4fc3413e175bdbb9ca7ea47e14. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWS2212150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb655690aa10220a8e0ecbee05cb5169b8a77f2b6a22e75304ed2cdded7f23c24. 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/QZFZ22333465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ee3ab0734bfc5e65d6342eea5de0cfbaa471bc5a7110197cee8441aeca5f91. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTAX2376342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef5ffed5ce21974118eec9267e8bc764257a5fbe3cb1a56d5023912b8d671c9. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZDA72480756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3eb49426c187f21108dc7c7aaffad293f253861ff9b1311c753d826a8b38ac. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZRUP2400662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3b7ceaa9c9df544aad1f542c802009973e086c429771f086227f11022d396d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZRUP2400731.