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 0x372cc57adfa1d60fffad9196fc9649a62f5fab1f4c24d7382448919c074c538a. 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/efc2277a-81f9-4587-85ed-1ed4648adf0e.json and https://artists.proofprofile.net/proofs/artist/efc2277a-81f9-4587-85ed-1ed4648adf0e.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 0x4b3d74d86bfb65ab0e298f3cfa71dd7bde4d537c6a1b1944c3909fb5763e19f7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:11:25Z), 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/QMFME2070820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3dabc9ef110e04aeacc50445efda604d33637d1c90eece6c6372b2817dc785. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM4TW2344154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226b67a3102d3d45b9fdd1044ed363341e739cc644fffc3bcf252f3eab39ac8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX2303883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c36b0dfd9550719bcc19f714dbf180713e5250e848d9430affdbd8d7fc2416. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P42324653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a292cee61219115eaa70198fa36fbaccc232d6b6512d17b32907ae47ef017a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6MZ2306885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df91beadcd85d68d4e2d1d5d567a2708580c8e81ed0bd4025bb761a299a2722. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBMA22484907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa58a5c97a2f1c98f37f55237c02be3446a09f1e8572eaedb99581d5dff2d8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/UKXN22489174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cdbf3dfa8cb979a5d20bdfc01101cd158e627d70651d0e2a3f4c1b5daba851. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/UKXN22403135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef661975c3c393a8b566a1236ded2993f1f574e3c884b268eaecd90f58d35512. 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/QMFME2006179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3393e231b3db1092dbe6d3d46279ae179e6034c4ccc06b4a6412dc0740e37a. 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/QMFME2006181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31040eacbaf9f4e5e18ef976e98d6c3ffe4a7673366016b9d23910c175865477. 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/QMFME2005854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c77bf3383738221491da88a383738f6bfb390a9b50886cd6398a22129abc5c. 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/QMFME2005880.