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 0x130a93d4426aab8cf477e95fc17262cc4d2f33314615ac60fa1b90da75620f38. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14b8633f-1aea-4da0-8d6d-2b30ec5a6cd4.json and https://artists.proofprofile.net/proofs/artist/14b8633f-1aea-4da0-8d6d-2b30ec5a6cd4.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 0x2dbb53c500a79f7562d36efbe66283d8ec47be4c8eefc82f0f1fd19bcfa649ab. 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/QZPEW2463070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ba396db5d2cd978cbda308a73f183495237c3676363108de2307330eaff93. 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/QZPEW2479792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1feb0f6835c3d3cc38c03ef042cfc5abb65f5cb95c5bfabc844fc62f98c79. 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/QZPEW2479799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90a284bde7ee76672551001e68c3c92bc4215a87dfd653740f9a7aef965535c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPEW2479793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a943f0c481d255c8e94c66b8e3214ef17afa771662fc35b98244e11b71adc9a. 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/TLVEM2430525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c198e62b52076d257d143bbd8cb5a6f6322f2a4a8cd2900aa06ea0802c37098. 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/TLVEM2435233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b78b4dee7e7f3f422e69ff5b80f5ee9b48fef8a498708bffc5139e1004a4f03. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:20Z), 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/TLVEM2437255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41ed58a1585c430c05dc0f79902d016dc0c8db5fba5f44361e30ca1a3988787. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TLVEM2454976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c02c95064479afa13f08ba542d073e3eaa1e3885e3c85e7d8e95f86b9ab7c71. 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/TLVEM2454977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab85419b1e9066942feefa428c06d3094d6672c8afaece07594af4adf28cdd8. 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/TLVEM2465548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d61cf6cae3ed3ed3172a62c1209baf95a64a01b9dfd164aa7853003c8ec84d. 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/TLVEM2469111.