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 0x2ca70c6ff7fcbb6f081a410870b5d40225a0d99dab70a5a007806d930c3ae952. 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/b7ff1a0b-7bb2-40c1-ba8b-6f2803ec4440.json and https://artists.proofprofile.net/proofs/artist/b7ff1a0b-7bb2-40c1-ba8b-6f2803ec4440.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 0x27f194a06aeac8343736fedb914f3473525b1a9021a3438a19e241a3e7bb7673. 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/UK4UM1700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a3c6f2a54b853c774801ffd296f7fae8ed1f8c2736c550ad190622e366f670. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UK4UM1700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6124020a6410084787ed76a43c05832f150dfa9bfb543a211f0bfbbb420bf9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UK4UM2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fe8aa52d45ed6bff013daae4f80d100029ed2531849fcf75dead71ef1753d8. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:34:38Z), 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/UK4UM2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fe8aa52d45ed6bff013daae4f80d100029ed2531849fcf75dead71ef1753d8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/UK4UM2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030bb88db17c6beb69e06de020d51b6616a8a7be792ff025e4dc418bf5078690. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UK4UM2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f632e5fcfb50bc54217708ce09c55a1e6736367f5eb1ccff1c1e32ae96f157. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:08Z), 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/UK4UM2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030bb88db17c6beb69e06de020d51b6616a8a7be792ff025e4dc418bf5078690. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/UK4UM2200090.