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 0x6dd2953fd2a9d82b4372fa250c618b982b846217ccae8dc9483c1f5fcdb0a381. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3964f11a-292d-47b2-9b36-c9e237c90eca.json and https://artists.proofprofile.net/proofs/artist/3964f11a-292d-47b2-9b36-c9e237c90eca.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 0x2f35b394c8c7297355d5cd7e2fad4431b71c6a21a39059f3c47a9ab933efd5e6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BK4DA2460769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78139ceea7f3c1a8df76411d20f1dabd3fe79a3524987e8a890991531ffe038. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BK4DA2460770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a8b11dfe58b75b578bd81450a1904272c62b089ec03174938099dd155989ad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:49:15Z), 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/BK4DA2460771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb217d96d5522b31d52c4bb41acf3c39c119751119ab4e319d3ffd0b818e8590b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:56Z), 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/BK4DA2460772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9865849bc9c447dd4942b9503e4399304e524f076b6952e2bdd6603d92237. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:52:20Z), 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/BK4DA2460773.