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 0x41994050dde85907484524107762918122c784faa7e208a6e841cc9787fcea2c. 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/e70677e8-8197-4135-b425-d0351c1ce4ed.json and https://artists.proofprofile.net/proofs/artist/e70677e8-8197-4135-b425-d0351c1ce4ed.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 0x1afbbd48eb45fbb32f034024e4ceb50e8e57bdd7064828d327421908912864d5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKXN22320132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d7e098c60955e57051a3ea9ee895ca5613b3ae2defea234e53c625225b0303. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2289554239156ef73030892b0745cfe6e437e24be2544678f4d1736efac6166f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX2000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6813e05629a7f24e4538fcad3b30f4d450a702a27363b50e1479673749465f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2GX2100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba589d122f3cc50e1952b0d8446bb55391ebc9eabcde2dbb65e41f73478b7d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBMA22108804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5807dfad3bbb6aef5939a4355512ea1234f730a404035af84f4c72cd7fdc6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBMA22340605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a51942c517d881d3b6c0919651d0a2153bf1dd31b3c62058de9d33425acc08d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2GX2100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91dfc88eee0563db9901622f44c5f44aa673f2e0b3c5fa7d557933ca51f820f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2GX2000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef28e0f8b62719a5c20c2000822220e6e8b5b71fc07cf90c541ca0cedf90982. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2240196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5ee21daeb8157039b88d831c1b3c53fa7ded86da349d1cfe9af25e5a2628aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX1900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f123f81a3ce451107988095439a6d12dc317e6597a5aa7c602046a68f275bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX1900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23474b0c806256aaf67c03786d06ebd2b3aa1cff89f01a54cb1096004a5d38cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMA21815700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a98145e3b7737d58b3e9ce9d57586bddd642974edf8336e235b4706ce426d4b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2DY1800991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55990210feb38934ec26dac24397715a43a5f44fc7adb01368c900e0fb74079a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2DY1800995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396cab7abbfb3e569b47b16267369bf46ea465b708beaf4afa6f70cabd2b28a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22506350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048eaccd506426665ed99666e7b141e589be493d4c1dc1d5673c06f604c84b3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22589500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51211fa3cff32bcbbaebfbee68002a0cebbbee99e659906d7fabf8af7de012a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22589501.
Prevail (with Unknown T, Billy Billions, HitMan, Kay-O & Alchubbino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd24e8db849d83e3c22f4b5f7a01f7b9b092b9b3c3448123285c8f1e512c2b66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2485947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b16e7e2427b0c5d216afeabdc0bdd4ce809d8e312f7514c2845c6d9ba0380ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2038492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b23100ac38964cdb2472b15ad625ccfe34fec01ee2af34f56fd31a6eeec75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2GX2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48b1104ab392c43e7f57ee07aa2c90b63fb9892554e461298bbbb189b77855. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2041513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7609c79be0827d551e09f0bf57de5134e2e7bb50c35ae03673157cf08b3799. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P1956520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4746d4c5a0eb924d88a2bc58fd3d55263c8fc04ed2aece19f97ae84450c31ef. 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/USA2P1946260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0fa97d7782d9e237de5d1fb1533676bfd05b4f608ddbd57533bffd1ff73c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2GX1900261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9d88bc513a8dafde8fe9a7e7927885a616f7fcc6e0a000c7f6ac5488c1772b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2GX1900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e7fde465783db6d5b4239299fb5fe89b8799e408de9cd3e9c701f84df3618. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P1923738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23474b0c806256aaf67c03786d06ebd2b3aa1cff89f01a54cb1096004a5d38cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBMA21815700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd8eb65119f179c0120ead1b6b554e5b5f34f0b56e755cdf6ccdd9e971aa02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKSWY2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441e1b66fdb4647deeab4a894b41ce9bbefc94251924118670d67860d1ed33e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd8eb65119f179c0120ead1b6b554e5b5f34f0b56e755cdf6ccdd9e971aa02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKSWY2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b83b734a4493df7703b6d912f1a8437ab07d3adf7fc0caef50460216547c4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBUM72003396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa2f6a1a4d8ace71479be827c396c112d546688e1d8ed987e99f91d61dfba43. 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/GBLFP2418247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141e4aee698a15b8b88ba635c9dc3abe55e3aa10b399385cf0052e922067b21d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX2100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e62fbd9848e797a5f5bf8f340c8236d39e1035d79b525857b1b0edcaf0e7e17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZXT2352464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7e5dc4ea5c80a6eefdf4926cb48cd057b11b40a440c17093720445640a7b0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GB2GX2000113.