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 0x273afb246631f2095586274a84519da49934293848886e6dddbd5849ebc9af3f. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94be9411-f493-47a1-972b-8f656bc17b06.json and https://artists.proofprofile.net/proofs/artist/94be9411-f493-47a1-972b-8f656bc17b06.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 0x3f4e753f0098894583cc664ba5c1c8bce98bd07ceff89ed41b7d7e1b70c8b85e. 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/TCAHW2479193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f4710d1571757c5cf3e06f98dae244e0b1906bc14e39486f683232c0495fe2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHW2479287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a95ec0c9dda037acdd5b3071a4312dae8832dd8122e0beea92aea12e4d4c8c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:56Z), 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/QZWDW2522481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83d46e853f83c5e760647b134673614c18814404151f1ea15dd8837cec4f3c7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:45Z), 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/QZNWW2419904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a45319845a3abb3f32cdf695bfa3febd06dd01ab7758a7c00cfeb5253662925. 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/QZWDW2522482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88abd0279fc0c6c5745f0e12a82d5bdc35549fce459fe6b94b9045612b7a1fa9. 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/QZWDW2522484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1c87d3d4e73ccbae2b2413f9a090946970cca7fccb7ba8f9321401de599452. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:57Z), 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/QZWDW2522485.