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 0x3044220d6649b37aaa716b38df699c0fc1457815bc22999bc951ea594c3738bd. 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/1e5ea41a-5692-4724-ab8e-11e70137e049.json and https://artists.proofprofile.net/proofs/artist/1e5ea41a-5692-4724-ab8e-11e70137e049.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 0x70bb67a7e3d4907987b24088dff8bdabc76d49ee02f928b0f747795ceddd7ed1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZUDB2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c27b9b3275d55e6a7caf8a0aaef2e7a40dbc8bc440566148bae45ff2774fe6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZUDB2200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f91799952506bc6b97004506f80c672a5163d51ce755585f7c489d43a9b4f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZUDB2200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0310ce5ed4d15f0f5addb49cf2ee536a9905b19c6d8fec5ba91d1262155fef2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZUDB2200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926ba20fba95c4825f8c923a51dcb8046abe147443b3a8586a03a00d728bd1ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZUDB2200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f2f5daa0033aa0c169d1700d7c0fe76cfd66370d48bfa816ce957d95fd6311. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZUDB2200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d69820c1292cd6864666d9c974c3cbc8088cfb94e64ea2b18d7ae596331db0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZUDB2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e8cd674b953dde2b2b97515bf162f12e2917b926ef50fa869e49213b7e5e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZUDB2200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b0edee32a76ff376d15988d30e88a1dd76d43130c469ff7fbedc42144136e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZUDB2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ddea0918e26eba64b4ec72a07007916f098388c0a6fbe77f42aac93333d4f7. 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/QZUDB2200135.