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 0x9a51d0f432368ce3c59d6059ca1fc1472a839aa383847c24c556bc3c5ccf5b29. 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/772c63dc-5408-406f-aad6-7b4d44b8d99b.json and https://artists.proofprofile.net/proofs/artist/772c63dc-5408-406f-aad6-7b4d44b8d99b.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 0x3d7c012e16ccff6909ae634f7fb9271e9406f4bbcfd7fa765af902c68c5594c6. 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/SE6SA2377194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4501e969a4615a104c7af5b29986af9e985f1596ec876b83684ca0a6c186e2b8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SE6XY2331970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfab00d8d5a1f3eb964039af1ee3f25ed04cd4fa28c25e9ec6cac20f006ff4d0. 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/SE6TI2304850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fbc4ad5af4ab233829dceefc4567595fb8e6755d833d65c2d09195a1820bd3. 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/SE6XW2338840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a2d54442cc4c5c9e38c9a1c494ded5794b90cb05977e61d94212b2341488a7. 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/SE6SA2345967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da2e127eebf82c9c54592f40679fb128565b195d71fd3a1b2ed752d2819ac1f. 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/SE6TI2321549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f411657e5a14e5e416e36f25bcb639099fb8773a5437e872e32f94826391e0e. 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/SE6SA2378639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea681c83d8423cc616150d94957c3892d48ddc99cc4aa5bebc35d1263443eb. 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/SE6SA2301130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c895debc7676704f6ba044aeeca0a29f4ae390e7e1db8ec917034ffa8852cc. 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/SE6QE2388882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e92bce6c9612f4680d3c1c951a39e2fce876864a9d8382b413e742b0981dee. 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/SE6TI2315257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985699bfae9368c0a14672d1866bab13e23812981458a58118616bb14edf9943. 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/SE6XW2361162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46d3f1710a24f1216dcd93d59e1d5163c55bb98dff14ed2d3f575bba25f9a85. 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/SE6XW2370679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61261ecb06eb61ce289bd2dd3c30f95efab139f835bd91edaf19f59601d8ef5a. 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/SE6XW2319929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7100b122895526dd82742baa260ae1c1dba1a764b7f85ec9c73d228f8bb1f8. 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/SE6TI2331554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ff20e3391660728c40a6c20b602a23d972c536d0a133547280f5dd231d0a67. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6HN2381043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8389864ea7f2f471358bca48e1213f03e62adcf4f3c9f39e6179342d3c7f3a. 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/SE6HN2381044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d35425e6d5ba84a83d9ca336fc1970d39da586485b74b9ac77dedccb799ef. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE6HN2381045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8c7a4c388d205d627e808152d428fbbfee6f897dcfea38cfef58a9101dbe4c. 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/SE6HN2381046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b06e8a0d4d2ddc489b14aa867757ba380d41aa57388f0446859b8a9e2a4468. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE6HN2381047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4347913ca40faeac99560928480914c2699b0037107b0a8b99dff2bbf06c9a61. 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/SE6HN2381048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803164ec48a6c557fde8d0dfb1cd85ecc3068644c423e897fb91176f161daae6. 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/SE6HN2381049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4820f010f5a5a0a8cc26badbf304a1e7dced1d8e80ab70a0351115ea6f40616. 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/SE6HN2381050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2bea5491d80d91123cc560a6451e42221f6339e2fcadfbc82a7771709e838b. 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/SE6HN2381051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2fd1591bb73abb8972c7b91fe4c4586545857859e69305bbc91e6024d38428. 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/SE6HN2381052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcebb393e27257df965f26c090691e2c653e4cb2164d1342dc5477d138dbcfc. 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/SE6HN2381053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b259174f69fd4f8d8bfeb2c06f44acb7b473e484f4587bfd736792ef99d2eb5. 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/SE6HN2381054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ce27b3cbc5b0f3bc5233ac50a2b5cc91d846e82ef6b786c80ff0b9a2575ed. 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/SE6HN2381055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfcf72e98c44268f8b6db2d91db5f43b856985578b77870b9e7aafb2f7509b8. 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/SE6HN2381056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174cf5e49ac7c48fe20bec078ecdae11931ac46a391959ab21b90e27294eadbd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SE6HN2381057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2995d45084df1277a1644626df3d2e7f6834d11748bedd38a4fa2dd6123726a. 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/SE6HN2381058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d3086d32b533285163ff84b1070c164dbfb2e32f37ee917f89bca8c8f7f4d5. 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/SE6HN2381059.