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 0x957e1cd49e499389741d427c3032c3b6e0782ee5ee2c61d98fd0a850ac55b1b2. 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/ca9e8507-f542-4b45-8367-69e9f6bce74c.json and https://artists.proofprofile.net/proofs/artist/ca9e8507-f542-4b45-8367-69e9f6bce74c.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 0x952ceb53e351d282595bbe4ae6788352c479516e0c87b2f50fe2391aeba352c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATR981221054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbee1bd7b5d31d652ed8a45c3f5b0cc6bfd60387290f11854d4534e491490f8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:56Z), 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/ATR981221058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bbbc96022d58a7f2bb0f2b616a0d21c13a60a8553517b6b8d4f55c2313ce98. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATR981221060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9915b30c9a87fc95f1a77978fbd72b83895696c6c29639fb6dc484c4c4e18b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ATR981221062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccea2547c5b88109d488dae34f71575609d42db429125118ca98b6fbccea914. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ATR981221063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddfc95cb7b814aa51b7e3ec8ca14ef29aec9884becaa2f3c2d7e65e2e49ece8. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/GBLPF6788598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a72c924a2f1179bf6164cd524dec5419bead52d1fe9a821bbb0a6f33379fe1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:40Z), 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/GBLPF6788600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ce571392bf1c85dc8114b89e406c6a47ae43d276c9621b571ea875bfda6a2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GBLPF6788602.