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 0xe360bc0a36be5f5c8b05fd3d7f778f6ecca0d674f30358294a9b34ccc56d38f9. 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/b1768c6b-0f5d-4572-8c91-ddaa80956b37.json and https://artists.proofprofile.net/proofs/artist/b1768c6b-0f5d-4572-8c91-ddaa80956b37.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 0xbcc2ce25025f5a2acd51c16fad6791c62ddf207ae57235bc4b44078e84a4a381. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZRP52136971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ad61c4cb033bdf588b800d823c298bec0f0e2e7aa58686f94ebb49836b18d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:54Z), 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/QZFZ42281459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046bba7f4437782672ef8f5b4c505422d62e77f2130d16c9723e086955a5c2e5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:30:57Z), 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/QZFZ72298324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbad31f17e841a6c5a7b18754eb9e89e14ea554560a466c3765b60b1f230690. 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/QZDA42272027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356cc5e34c2bbb397dc8a9c49fa61a738627c23349d8bf4219fd883fefa0a21f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA82242169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbcfce98d0ad8dda14f4acdf7c61849427a4acc8b0fd437f9433716b6a9f413. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:15Z), 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/QZHN52226365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fb4a16b5e54dc5017f5e37c5069f72dbf665679173d09d373ee8a133d40f52. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES82260924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d764748f1fcd0592b9871304cc9f20df4ecd4019d4ead51cb87d27ed817cae5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZES82260929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191fc2d7210e91ad069fdbc252b122a1bf02ecc3acbbab0dec0c544d19ad2a20. 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/QZES82260928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08280178afceb19d9d9ef0daf338353dafb76cd003b9e0c9bd30a670f7152e07. 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/QZES82260925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4704ce10b971a14e9d7a506f5ff74760f0756648f522ad4c7bb141bd851561f9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2281895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb729e7d453e035aedde486a0449c5436e63c2fae4c11008ba7919db8f9f4d9. 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/QZMEM2231081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b2b7d53d5fa31e20c528ad9411865a6cee2ceea61e3f73078121ff2b6f4423. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZNWZ2247593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e47eebc07f240ef9fc46e27a716e61ae38c9e577cb7e0924aef887a729fe2b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAS2245998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8c543f860397f8521b55be1d5c4efbd3b8d308dce58f8159136732763faaa. 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/QZTAU2297184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2479586434bae8c1721a5d596b1d07002f3011148ba5b81793ff225bdd4bf081. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTBA2277198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41616dcb214015f17b1160dfbf011c85615f13d31bcd4394e6e321085aab59c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:54Z), 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/QZFYY2328137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35f2638896f2b5dea55613a02ecfa567c51438db2b52f15789db2ec4887d22. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ42330319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abb68c0f3466401ffaea714a316dbca132091812a6f1ae3f0079eb93cd56822. 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/QZFZ72315396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfb4a294d81337d89b42a4148c30ded14b90eb86907d2c8b620d8ecc9603b2. 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/QZES62316855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6a9f1a97bce12513ff7ea9c7849e0e0adec25ace6346aad296b6e7bf4cb574. 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/QZHN52364677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86dfc97209947d60c3e89007472ad8fe438a7d6cb5627926d3267b78966564. 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/QZK6N2338370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5805c7ee47abbe484d5690b4efac161d41e7872488cdc11fe1a1cb3e996f6380. 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/QZTB32314210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55abbe106a2127497c6e4757e25153762e7c9d76d5ceceffd60865af1a9a304e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFZ32458654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b4818f287d721794f7bb9bbf3d518ceb25d0abea9ea528df7c984f426d0e63. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:56:19Z), 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/QZFZ32458724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c7135f4019c96277cfb5ccb1e4073d974a79f2910f2d08b4a409fcf936c310. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QT3FB2546563.