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 0x3a13da80d9aa42c779064db051da3d8f73533039064185f9dadb87cbc0c33dc6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b08499f4-2df3-4eee-ab6b-479f3f32b0fd.json and https://artists.proofprofile.net/proofs/artist/b08499f4-2df3-4eee-ab6b-479f3f32b0fd.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 0x5090ffd7f05bc9aa27513f5d73b3cc2c1f7045a453fc8a7aa5b0070fff35308f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:55Z), 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/US7VG1843685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216426af6dbec729977f753dad4eee8a7690c69effa713dba79fbb38ca5dc2bf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US7VG1958010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e253b665ae22c63e2b9674602fcc75d0168eb8b7d829a4e2d3098656dcbb0f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHZ42042367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f74bd7403a6e160ed0c4652eb20b0c87b6fd6cc0e8bbe50f56dd8f0a3b2c59d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:28Z), 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/GBLFP2330182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d756f2b2989e98702570ab60f8aa337c9d868cb48eb439f2fea39727fa36c29. 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/GX3Q92427372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3cbfe80459060a3b8600f3286ab6c6f9b41a0f23658fc5e04d21602798f44. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:38Z), 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/GBMA22401412.