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 0x412e7ceec39563bc1d3ff6896b1495137ce007ecd63c3d9fdd4495df553befea. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06ced9c3-4e97-45e4-98f5-f660c377838b.json and https://artists.proofprofile.net/proofs/artist/06ced9c3-4e97-45e4-98f5-f660c377838b.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 0xeaed6aefce2ceaeb9479305c66363aa51d1895ef40372dc926c2160968e63acc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFM2374863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ef7490cbfeaad9c85fa519fd07b56199da49b12ae151bf9cf1e71d6fd6c1eb. 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/QZWFM2374864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816c022bd717abea7d7f6fa642b67ba4433cd0700d21abeb142097ec7eb0190. 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/QZWFM2374865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cc02a620e0b133d5d651a503a04d39ebeb46afc768ef467bcc5a4979699e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFM2374866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c70c7735440b9d0a5e57c4952ab725527ededd640c7fdec50b1909772bb2f4. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZWFM2374868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b7f6dac374a19bc34c9f9e375a2fcd27cb39b97beb09cab2f824ae1f18518a. 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/QZWFM2374870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70daa9ab64b330f5cb5d0bed8822c35aae5e245664dea4d6f14801fed08affd. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZWFM2374871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2821c0103d92d0d9d4e804918738765aa036ed97c2baefa40555a9e74eef4135. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZWFM2374872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42910a25e850932d5e35f30cbe6607f184e83a9ca32dfdd6796f26a24b9cf272. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTB82283241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e86d002248d55bf3ea2a9b8bdcd06d447ef44fa02b959a2d17bbc29fc48f67. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTB82283243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002bdcb40eee55f1162ce5ad624eac0595d07e06bb2b530ae5a94822e42b11d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB82283248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ab954588d5aaebfd7c942d803bdd0a984fa253921d523bebea207d2364649. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6P2485976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c72a8969382d1f61a56bbe73f3a9fbca98b2d76631fade42575c8695784a3a8. 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/QZNJX2389774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aabf127f881d5dd9d1e423a1a41e38f3911148a0548494ca1cae6602acf54b. 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/QZHN32307361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60b18e1b0e61bf16a745ce74b190ca482063ed1ee536852cdab88792241cb8. 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/QT3EX2435072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6050bb20bcca74e37d131644fb9057808a715d0c2bf5d26859340886a2e60b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QT3EX2435073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb3de132500b80c253f3f8b45d6d7b7080d1cf281235228c439c1d7e530877. 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/QT3EX2435074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f8c487a4624bc72a19c8752d7c07f7fdf2f75048d723d8d13ae64cbbec723. 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/QT3EX2435075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34704bc5a74c2a593934b55f0b246f6872e4c2e6a84cd27ae261a48ccb1d6ec. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QT3EX2435076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d20de1f8ba0b2f5c1707edcb3e782d6ac5f990dd6a79afd69ec4fa6bf52ec. 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/QT3EX2435077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a2d6b680138d11933c235303009d29703fc398849ef75f36c766a15dedf1bd. 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/QT3EX2435078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0351afb6c0c780e6697089b5feb6b015f8552b2ff599339d500b0ce87fefb7a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QT3EX2435079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8713755619d11d1fa54367350aee3098e97aea1864a48361f286daaf63387. 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/QT3EX2435080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5868f32b67914f78c8429f10eef2be36b4c94cc276744366a7f5d4dcc81c58db. 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/US7VG2514385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb9d32f888a90a6f3a48cb13b0ca692ceb95293ecb51b9b230d63e3ee407d96. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US7VG2514387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5489b7df0ff118fb70f68b8951f6d7c6d0c3543432d427f9051666c05ab3375. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US7VG2514389.