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 0x8598a9100dd0d58a9f3b1691998433bfa8b339c15c7ddf59b75aa8927ebf9c85. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b320eb11-a351-43c1-a402-b02ace78ab0f.json and https://artists.proofprofile.net/proofs/artist/b320eb11-a351-43c1-a402-b02ace78ab0f.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 0x1325bfc2bc927321dbb57a032b0261cd2460a2fb039527c058892c00a1c3f5c5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TWL981500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983af22a0ec098b39e0bc839e3854595b5eb1aa96012c8e0e8c4ef2f0039b324. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:47Z), 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/TWL981500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ded268a699f4c6a4d95606bd94010c7b386ebb3880a4c80452e62918feeded. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:39Z), 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/TWL971600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5dde1092b96c8846be085adcd7a0ae87576e14f8877ef4c8eecde6d7213221. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:52Z), 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/TWL971700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaca24194e90c9a5ee3a1ce43f27254f6c4800e06a95a6b44f72f38362fa554. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:25:49Z), 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/TWU712408028.