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 0xb2fd5d71b9e79d4dcbe2b1f65a16c7352c8c3ddd6e3dd7ba7b3e4b84b0672e96. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfba4517-e808-443c-ad84-8e0a3b7029cf.json and https://artists.proofprofile.net/proofs/artist/bfba4517-e808-443c-ad84-8e0a3b7029cf.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 0xbdbceb7739772fbdbf0a7c5f7356d462eff60847264bb4f9fecf5173d22bc7bf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZNJX2389369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eff1d8e1d31cd48eb2365e592b22f95f6a87d92e753aa5c74cf207d8df59e87. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNJX2389370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d36be084020ea210b9144ec6c7e0caa43ef100b59246e3b43abf64949e1fd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2389371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b13fea726d7e4151cecc750021e82e5ccfb6c8b7e255c6efe5c870e174c8b5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNJX2389372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea6e965b459d2ab9a1da3d52263fc7aef717862d8d0f82672665cd87470fdf0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJX2389373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404abdbcf7ead8c290d00ab87da79fe1964ff215f374de4379af029fd5944354. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJX2389374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c39997d0b81b2753c0807bbf45ae64f75765a136a84e4598f8231b902952f74. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNJX2389375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d91165fdc20d83cd1f260a10d24083cae5410e56686f317c4de13dbef6ae505. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZNJX2389376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570fc4750f5122b84ccfda2cdbf4fbe31c9bd33501c52bd11314c67b87d39e8b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNJX2389377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da769779a04911d7a658a528ef3e5f22b4aa95b676f8671ff69db05c8f93ca. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZNJX2389378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce256cc46526b2c63051e1a00543aa63d400ea537ce7eead177fca890aa21520. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2389379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44560aa276978fcf20f6880b8eedec2cf40174838b2ff12af5da6d015baed13. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNJX2389380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48295994110330556a32eb68b148ff06fad473a694de63d6748ab9c87b474a6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZNJX2389381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151f21f9a7c9deda77b94f20130aaf3ea2d12356a70e0ac6165eff66d51b1e31. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNJX2389382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13622c266ff02325b7e81c68db6c0dc86d6b65de9b00ef2bd513b3700deb976c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2389383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4272d848863ce9a3ca0b4c6a9907e3c1c771e4bf38b344768617229ef913d27. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2389384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54efe7932dc70f29f71d985307931495e7187fca52e2889675dd4309629a367. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZNJX2389385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40560dc01b94dc9d068c5c774e154c2c56f5096ff640a6b63f7ebf7e11b13d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNJX2389386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdcd4c858882cc029d1f09123dc163c9ad0fd5351f11cae7560d806c3c57a55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJX2389387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66c283de204a35beb6a31ca24e234f8abed0093162862565dd522db53f8b94. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2389388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd3bcbe5c92a1415f598af43646d5f84a5fe6efaa02ede9415d0930ad39ca26. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZNJX2389389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e292b4492a364b65baf7789ee5f689c5a5c9b403cacfe56738769cdcbaf722d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZNJX2389390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350c6e815e6567a3f2d80418673ba32a0b795bedfcaaa08881e885bc3769bfa0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNJX2389391.