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 0x05a040159ce299135be06627dd16f45a9ee1f144edd5308738f643460e73873e. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4eff25c-70c5-498e-b20b-03a1c5f37a1c.json and https://artists.proofprofile.net/proofs/artist/c4eff25c-70c5-498e-b20b-03a1c5f37a1c.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 0x589fb007d4f2454943f0b8de06819db38426491e0892661182993d20274028e0. 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/BCJR62100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013729630dd9f64a67e381154d1dae05daf8aad1780e7621fe5b80f56858206. 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/QZW9M2311085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2bac0c2680190ab7da043b2bdd0dc639266058f5ca1339e8113bd0c794896a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZW9M2311086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64069c400c341f4fc68a084909bab8bbb07017b6943a303e8aeeab26eebd00a8. 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/QZW9M2311087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b72b0049c86d1d83a23523e272231b46be656b4758027054e5ed9b495c82fd. 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/QZW9M2311088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3477dee1689ca2aec86d179164da24e77516afc0b6c330fff9d357b4be6fa. 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/QZW9M2311089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089db1b3f4c5071c0faae765931237da1a9c1f76b6228343232bd9c5b49e3e58. 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/QZW9M2311090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c1201ded480a3ac768fa88c14ef77b0271cb25bb08c438c73302c850cb6b65. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZW9M2311091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a486eb87a9072d797575d60759f225b510e4a3d3cb86a92105b8f2666d6e45b. 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/QZW9M2311092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07ea469aa4441e6e63d0da54697a8ffb6c556c3e6a1ffb0eda03a066d753809. 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/BCY422200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be58f9e89a6b1303ffd928fff51078393bbe69418ad0ba62b65bc5b1ffb7b73. 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/GX53U2032365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c8afcc784e718e6dc6ef082e52fbcaa37b7729bc2280f6184e8c78e6e8c03. 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/BCKUE2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f3d90d4ba9edd8a4f19e2a343d38d40adf9fefee515908e2b823c6b9bd8067. 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/BCKUE2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41570ac94973940bfbc3cddedfdaccd1ddac5a7bdc4edb024d65e30ac9a2769d. 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/BCKUE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729acaf034328d1f9caff49553a7d84aaece78b80b1b0162669a64505a93b3a3. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BCKUE2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe2c23bced4316a8cf1c533c58b5925154871efb952ab8dc2c882edf03c26ff. 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/BCKUE2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f7d996a51218a87557b6df4720ab8c137b1570df84c9e13d8eee4c589c5fa. 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/BCKUE2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fa83f424ea581ac70e7cee1edb41fefe99340df22d141d11a02d2917ab1081. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BCKUE2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3940ca4d74e12a192d0cb19ed056575fbb9a94f4e1fcb725f6fc26ae27d69e5. 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/BCKUE2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2fdb12e467c98fa728a4e91792125e59e7c58d68004f556ea2d33ce19020bc. 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/BCKUE2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896529e19de586cd563fb908d398ade3b412c3b674a4fcc2f41f19b8d11fe927. 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/BCKUE2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e525d0229b5d227caa76777d1af0a7357993b93e67bd2bde001b1168df5685. 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/BCKUE2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae1b52812a4ea6f73aee8d6a8581e152b114ec7a925f0cffe9186685f950fdd. 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/BCKUE2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c101bcf8fa4572bed4b41beabbf38c1579266d86fcb06896e24b102b6c1e988. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BCKUE2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f40c439a07ab86ba548112dc80bdb67a9653ecd1eac6fd5b5db3d74859bea49. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BCKUE2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705459d16bf888803bac3906cd85714efe3b811bdd36023a521b3758558cc35f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCKUE2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045bf0c353b0646bb834e4ae21b481ae08dced47a55ee587b5506262337532c8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BCGNJ2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72803e231c1ce22f6820c5e4827f3beb3b86a91c4536cf6747cc225af704c9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCCS92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621575bad6fea0cbafabbfa43ab17cf2af197151cfa2e0b3065c1977ec562238. 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/BCKUE2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcdf03e612b7ab642a8dae097b75a07ebeee42b63332a8292d78814985fdd36. 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/BCKUE2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e7bdd655dbbb95dc97283c9cff589eb2e957ce92a26485043debd1b933862. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCKUE2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2716d50cb3f9536308428fbdd8364029d05229701a7718f9a9028cf208d6ad1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BCKUE2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca1ee085ce65b95a1dfabe7812765d3f1721be691ff9241a56fde0a2be8af5. 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/BCKUE2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283d583dad500c93d34ec917edd963e3da5073867d88e8de6fb5be807d4bba1. 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/BCKUE2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22ca35f5ca5412b971f768b4f60796cb02153968d44214da29ae570f3b6670f. 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/BX49O2100010.