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 0xeac5b1bfd876847fecfef008759dfbd6586514bab5744a2f3063ca4a3b661eac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfb63aca-0ee4-47e1-8e52-d33f45a9dd52.json and https://artists.proofprofile.net/proofs/artist/bfb63aca-0ee4-47e1-8e52-d33f45a9dd52.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 0x2cd4c1e8547615452206d106e87e69c92d8c305ccb7f9021a23c782996082690. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMSAV1103107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6148198b1c79e213498e1d30164051118c6c4b8e6ed5a364fa28a52022d23e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:39:38Z), 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/QMSAV1104250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57743488b7d2358f5c28833c8c743107959c7d32833e5a1e46858021c75db1f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QMSAV1104709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eeffcdcc8affe2bf4a71e4776fe894e040db203bc6c9903218186cecad771a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:48:53Z), 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/QMSAV1105572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea97e7aead1133d5e23f4119f761265cc5e26811cf7f2cc22abb1c83d0fd75c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:27:38Z), 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/QMSAV1105618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580e031eb9674e1997927b708401ddf427c3e82340318bd81f174bc6eab6c42. 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/QMSAV1105832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a37134815b98f3a5a8981e0f2e00053500fc03980db885eaf27a4495f38bb2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMSAV1105986.