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 0x35d41c28f70c72eafd13639cd0497084ce278148bda15997abeae70cca05ba4c. 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/240be395-3ab0-4177-97ff-a8d60d0fd70a.json and https://artists.proofprofile.net/proofs/artist/240be395-3ab0-4177-97ff-a8d60d0fd70a.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 0xd3b8b1cf56e232f740c34a196355e2fd2e26540cd5f85882f705ce3dab89379b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BCRIZ2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611ed05f276e4d0fe2fcdb7c55b5bc58682ddc66864a007a0d0927acdc37bfaf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BCRIZ2301420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511984afce428aa794226ac77f41cd965ed610d6b66544560a8035a32733bae0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BCRIZ2301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdde16423143fe001d8438e26320f064c882d6a0c28ae458ce3f6160755ebc75. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BCRIZ2300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdade491c840fb141948f7b341d330e880d78dcb7651a943c19ce2098e73bf35f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:57Z), 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/QM7282474295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ca72f9056cba1f83f6654e7ff7b5d112ff78dd695bb7cc5e1e87d76b0b589. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:30Z), 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/QMDA62446905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1401276736058db6afb381488f497c08936eb7d64fc532f2cceab399544173fc. 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/QMDA72478537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2929dfe9e6a66f6e3fc2d8608a47e2606f5e793bfe92a3c25c7af091fc3623ac. 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/QMFMF2454923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fbd7a5fdcd39aab6fc88d28cc472490abd1b884df1841b96998ab2f90ed7ed. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QMFMF2454924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9557c1185ac0bd5a4475029d542a3b7612141ee1408f0d984a969e89e515971. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TW2531729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca0a552446cec8c374bb281ff31f41f9f0e45b66d903683040070395201506. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QMDA62595675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0bf7e9827aaecd769d23b42c9fe32721a5b806accf629e955ca2459da22247. 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/QM6MZ2406549.