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 0x8fe6fd3731ec9f0f1a1dba89df153a55e90a1a827368265908bc233d266cfdcb. Chain 2 (Bitcoin): anchored in block 953782 (2026-06-15T12:13:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5c1b294-8f86-4965-a86e-b23c55806bcd.json and https://artists.proofprofile.net/proofs/artist/d5c1b294-8f86-4965-a86e-b23c55806bcd.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 0xd63a6d5aff202418b6114abb1d5d1d597c057db8830824964f82f5bf14f63a2f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BREST0200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3dfad10be1a07ed50117c9a99590c7da4a9c4771f584aa9d1c5c3bdfad81a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BREST0200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0d9a08e81c9af351110af6c3c571540a373c5ce24e6d0158a3872e2aafa54. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/BREST0200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5786c537c52cdc1efbe2803273e2ee5657eaa8a256b6c8fe848a2ab64f108f4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/BREST0400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61dafeaef89215bde74f8e0586f91cc3c90693dbb4d9ca512b822b7b148e84e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:47Z), 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/BREST0800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608d6545d38c18164367f0115b8808f9c2e78d93a23b4ececff15d47e270924. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:25Z), 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/BREST1300026.