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 0x2297e9da479379735b65837bf2a11505d56605de377c77709e7b1b0dba180767. 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/a1073ab2-6883-4cac-b50b-6a8a8a618954.json and https://artists.proofprofile.net/proofs/artist/a1073ab2-6883-4cac-b50b-6a8a8a618954.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 0x7f24337f9416f56ac861ef9ad0221df226175fb76102cd2606aaf5f4658a5699. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:21Z), 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/QZTAX2446692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd172664829282a700a6fbeab3c4a74220aa46397cca2703084ba7c622518e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB22414346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf942c6cb64ae9ee42e1f23acb877e3677240ff66abcd279965914754fc46a031. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:13Z), 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/QZTB22414345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9165bd3b50721f341571527f25119b4fd9903e9f2a298e6e766a738082e484e. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:27:44Z), 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/QZTB22445216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd4430e7fc0161d1f50e39370ebbcf12cfa576e688e9a54bfdf732f0dcce40. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTB22445720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c45f3a2f42677a8cd6a9cf771c7eac987819beb62df7572f2f21e584c28d73. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:23:50Z), 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/QZTB72432183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d83dafd65358744df31c474b54c4ad4ef620afa8d7cb14b6883b55f39847d1. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTBD2446585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c838117e7eae5a59a88b018bc54c184cb132c0ceead88893eaf16e30e48ed. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:39Z), 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/QZTBC2482769.