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 0xa6d33d3af3f1e34c9e5bbc0db7e22d3b39488ea0076cb3ab2b08e6908e1f312c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed6ffa36-7987-4032-83bb-a3fd02d14ec2.json and https://artists.proofprofile.net/proofs/artist/ed6ffa36-7987-4032-83bb-a3fd02d14ec2.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 0x229f3cba0c43f1a05cf9d7882642671e5b467a9c1b768b0e9b0ef1f9f1b8b0bf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:21Z), 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/QZWFE2425720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175d41bfd52bb3f7cffc1488947e203d481636ce84f0accca650bf1e8d44433. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFR2487818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892467ba3a7b24c806bc2cfa1af13fbb7a09b5a28e55544d357b67eaa088ba08. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:23Z), 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/QT3F22454762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671f847708718d2de9a5e28d598aab888d5c4fe85937780fc778e926da5ed30d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:18Z), 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/QZDA62502595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cb5dc6ba5d0af8dec7561690b555f75c2e2617461921bed69a8dbbba91e145. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:43Z), 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/QT3F62502022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7713b18568b4931bc26e9aee3ccd0e43f77b1a4d6400349d06fb8b9932994d2e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F62502023.