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 0x4dd17cf475999f538d442232c5497e5580dad41b87c727ce0f09fb122c2967a7. 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/348d83a3-8d62-439f-bcbe-ee36da31ac9d.json and https://artists.proofprofile.net/proofs/artist/348d83a3-8d62-439f-bcbe-ee36da31ac9d.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 0x1a6092b382cff8c603c3d4aa9049f7eac0f66515eb477618d2617dbf60e3cf8c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN82209088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e196440aaeef854d26b9fd9a4da868c6dc8c9cad995423b2f383ca3e789be0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN82209091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b265bb90e196933230edc7b258a90892a9f442c6e66220feabb88b2b943b37. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHN82209095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d242656d90d4372e33e020d5ba73b52a88358c1a06d66bcea69def3ce6be99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEYOK1742061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ddde7b00d683f5a111b7b940f66922cab12c5d7f21a5510fe398f4c907dd61. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/SEYOK1742062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943ed0e35bb79ded5768977629c20977ee4cf56d1f11fe2de4f3c4c93323f65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEYOK1827010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe08281f395f1f9f153631beae8534408787117ded9fa3db33f0be628c6554ec. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SEYOK1827013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebb1749c4670920b3559044944a096d19634c8376bb2c16ed168a80e38cfb3d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN72276675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb5a74c09af75df0e96b227fe583c7531da3c5ec55c6cd64d593e8c17b0ea9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES91973032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537c2bcbe52cc61f0e24427d1e4b30b2e8c1093e0e6d8244279ee7abbec05cc9. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZES91973033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d38c9fa6cf83777e6715558380c2370341a3413954be6a61110f1baa4ec914. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES91973034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a523263dda36983fce7bcec6221d521cac95d92f5522e9121a6751ccae816e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC1969673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16121b5aff39c16ef822432bfeaf986e09161c04b35163b3ff217e3d53838c58. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYY2035981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05e4eda81fd185593bced382ef680d7fdd1beaa7b068a446df193ef89124e13. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYY2035982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5446d0ece2ef87000f486b0374c83a25d676173f72afac7c9cdd757810a3a004. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZHN72020527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5fdb687f38ef95ddc2795ea6f3a78e2569d6859dc64893bab4bb56ca93420d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2056994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af57291b82777228a8ab9d474ab526f7c90256951ef10026c9092b63797f855. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFYW2155928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c2300b5f77f37020e86410e1f8ccf79fbe5ee9c480e15052237549778b858. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZNWU2134254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2546164233c1b886ba53ac1bccd4f9cd49c8bd6dfdbd3ad8a8b366a34f0664. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWU2134258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc11775dacf20906f535e252dcccf545b0e2b6eb71131ca405e399dcdd30c7f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA42228285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483597065ac05e51a1bc6f627972fde8a93f1ebfa63367569abb0c64cfa4399. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN82371920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83eb59c3033ea68c70944eea5596001fb357cd875f0853ab9c5189b23fcfbca3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6F2254295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab65930e54e91cd99af53557e4f8daa9a03b73d1b1e6baa8e4cc7fbc7c906a3e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZRP52217220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017b87f4fe1b68f3ec3ed0c4c79ccec54802e0c12d09819f0e754f127bdefbc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTAU2277023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf1a618f070c144f102d761296a4c7d0f88ac73d7a4238a634498e579cf09f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IL6652205324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5f6069ae8e0dd449e813331f38caeb7bb70c24ff0e49e9ca0aaabc4d87439. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWV2286700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd7eacafb29dbfd0e73efe9a45e530589199490674ca34d57239a2c5e162128. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDA72272998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284b04f75e39508f2566bdec65af3c0a531d0d124ac9a00441dc0883e7e28fa6. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/IL6652305976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca51541427c16ada83045f56c053c67b11e34d595f7972a5ed6e9a502b94df6. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHNC2311112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4b16525eedbf77d28ed7c86fbc7aa075f2ae1b5cf706cd99e5266ec185ea1. 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/NLT2H2300518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199ecd0d78a5be90fff08a2705e173e033b39813c8b5784356dd693734f5c05c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IL6652306535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0816577003498766541581648d36f28a9ec3de7fed3c51cfb5c310fe018c7d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL6652307330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ef51cd065920429e4e367fc05dc20a6f41e22d3983974cddcb718777af0c9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZHNC2494562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80fbb5afd75b44dba9ad3faa380202e1f3716cb22e0051874c98f7a56f26542. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEQ2462688.