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 0x4de90a43c02cd7cf39955677f948eebef85b80ad27c39399fe73e5dc412b5eef. 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/a462a7ca-04d9-4c9b-a42d-f7d4676b900d.json and https://artists.proofprofile.net/proofs/artist/a462a7ca-04d9-4c9b-a42d-f7d4676b900d.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 0x5c55d604fa16ec1077c992847047bd39d07815a043487217cd7117ce14aa4816. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX872125566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de37c99cedd8e55f4f7353c25198f5cd579f1fcc6bacc09c0dba24acc14b955. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR59R2276995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe062458041eef753c0d4889ad65958839083ccb4063ab8d93ecfb9e0a647b29d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA092327076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079c01ac1b665177200dcb1ea2fa242999294f496df10338564238a130a74511. 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/DGA0Q2303373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b216542899c8d2f459d8e237828ec50c7217b3bcd52e27333b1191d99f5d3. Chain 2 (Bitcoin): anchored in block 957566 (2026-07-11T12:26:02Z), 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/FRX872496116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1b08878d4540a73eae78f926c4a7684395869d806bb7f828411cfa3ad6070e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:44Z), 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/DGA062432492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943de8b0f56f9f0a601981dc6d5293fdf6e3008fe2e5254fa5547c52740448b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE62M2167717.