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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407bb5179cb53328b73dc07a29041236cb6f9f0fccd9f512202fe2fdd62142ec. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faf2fab1-4395-4413-a631-2d1b8d52354a.json and https://artists.proofprofile.net/proofs/artist/faf2fab1-4395-4413-a631-2d1b8d52354a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bb468315880ab752842f0000f634d02ccecfa03b9a87d8c33a2b41f4bc5143. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA61891427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02150c1dffb9ecdc78d276020c83ed1403ae95641e1642a15386dc385bac45. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMDA61891428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0225cbdc569ebbc5d6dfbe89e076d09b4f50d13a9ac2c632e0207e03e8bc42. 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/QMDA61891429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992b8f8cef84b49788f4c0de3bad2852190dfa222010d9961d7d9916f85701ac. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QMDA61891433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34533314e5b8dedd02a2663e639708a121db963e32bb00175dfd237d521aba. 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/QMDA61891435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7ff447c0aee6b3a0a418692807229291ec51fa9fe282ccd9d26235fe6c5c7. 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/QM4TX2000587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0360de771409a36f06944e1c57eaa124b460843e1479e5b5b047fcaef9580db0. 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/QM6N22004721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd80da4fb464d25141e3a4647dd7cc962e3715601e463403d5936c08210fd6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N22004718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621221e05d09a6d8dd14fcbfc3a82a52891d59c4ce68382dd7ef5f50777fd3f8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM6N22004717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3476f179571b10f7011f33987b8dc64050f5a4a31d87ac48211f66a03992c0c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLZJ2015252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcce077cd57694058d81090456d1ad8d138eedf7be9a858d4ccca8eff73024f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLZJ2015291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a113cbbe41ca76022b93e25b59162a744e65539c487523f49f2ffb54c04280. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USLZJ2015293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c97ef24c167ff4492291b9a2259e3cddf2e456cdc590450c1de7b4e07c97b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5FN2154674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f220e94b3ce6e223bb95d2df8eb39f2ade86f45109709dc927d9014c5e942d. 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/USLZJ2175928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47f6913d6bda5154daaaf478883bb4bf54399d0a88b65d4d19e18e7505cf0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TX2000560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770f8a11edfd1306d45591180942d56a88dc5062cfd16ae1c1114aaecf64a52b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QM4TW2078911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aaf8430bfd2a5530284e0cce258b61e6d30632e9475a12212094e0da03064c. 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/QM6MZ1905872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4438586f25dbb6717ce65193ecd38ee7b86c186b6bfdbcd24b1ae20fcc50b9c2. 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/QM6MZ1905876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d69536a26593d1c43ad8597213a862c8cfecb4d06ff0561c763f862eb1c67. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZ5FN2419746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4836afee1ce240cae270ed4ab2d85f17f464f316eea9597b911a700963697f8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBWUL2405081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7742f0a379af4632fbdd19c6e6349eb786a35901397bde1d04271c4ac10435b0. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZZEB2398593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3d69536a26593d1c43ad8597213a862c8cfecb4d06ff0561c763f862eb1c67. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZ5FN2419746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb721538eb6dbc4a835a19cfdd1489b3a667fcf07ede9a612036a554d5bee4c78. 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/USLZJ2439616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc0179c287db2d2da73ca9b2f381b3c39e67d1794212c00e5c08d77256892a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2406466.