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 0xd0582cc6697eba9be7afdad417c8f4b37197616a53cfcb5f3d1419bf17a79dfc. 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/8be24cc6-141c-43d7-8352-6f3dd6ebede1.json and https://artists.proofprofile.net/proofs/artist/8be24cc6-141c-43d7-8352-6f3dd6ebede1.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 0xbdfb0638a359224f1a78eb6fdbab1048d75f07070f23de590110f6ca2b04c8d8. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QM42K1714904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796abc6e8bb93fb8ad3e27fdcc723e8d37e1795e9de7f50dfadd8f711713d11d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM42K1727533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dc598e9ad95a193d5ffda886374707ed5fc2272709249eb6d02b7a522efd23. 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/QM42K1761671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012575dd89046a35a97dc034e6301ac65b5f48163c01e1086d9dec08faa2a163. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM42K1787755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d28827620c7338aac0f0214cb4371f34953aae7e3b1dd5d2ef7206ae94697d7. 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/QM42K1712371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1945026a6477af666eb94dd847a111a18573efe248fa5c40aab3d123e7f2c9b. 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/QM42K1730146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec749ee7a73e99463e25c5ec258f9a4a355a38f02cb388237602ad9b978566c6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM42K1763284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e70197c7232eb35dc67812bb6bcbcbd61c8d7e62f11812bd979995393442d1. 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/QM42K1876651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4b0e3f2bf47d1147a339903f68b584b0596fd8dfda0af3506149dfc11bad00. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QM42K1794794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bd2f569e5cf63688b56380ac28c875e4edefeb72663f2dea6867fc07b7082c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM42K1828154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f44ab3bf629fdac1bbe78e987d55c4481f038af39620b7510f991424606b769. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QM42K1801949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c9caa22174b8bfbbf02498b68e0be1810bf6aa1886a9e312bf093d90ad286. 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/QM42K1862805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ae332d1e81bca50c4c64f1486efac79ba361e6e2624c37ca45ea34ce8cc34. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM42K1820050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b5a910f6a2620e376fda4550ce86701765af39be4dfbb74094673eaff8c760. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM42K1982967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3590337bc96eaa08d2574dd81cdc07f0a9c9d8bb95573894f55981d2bff5fcc6. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM42K1972091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a2b44fc7d693d92a88a79371e62dd31c7f43b8b37ec725edca862955e15447. 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/QM42K1917329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a899d304addbafdf427f57056853a72a6c6a111ad404ec26a7dcdad510f93e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K2075095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f63c3a2028f3845e635b2f206a2fa0507e97b6c2cff63829109c839bf1fd8c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM42K2086549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58f92726a23d787043ca3c985b06386448c843ba228c453741f8fba4c00a5fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2072438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a809723d778ae0c8ebc74fd5999a8f9040e811cbe69ca0d22e5c287dda15a86. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZNWX2181365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2529bc0b09c3cfc2e62c06da6b7dcc93e4d697abd6c64b862ed34654b7076c7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNB2038335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b3fb91baf4e93be2c4bfef70143391531c135fddd0ed5e691414552636b40c. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZS672292608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33434e277c781f9ea235eb2f88946cb2718faa709905fdd6f9d945248b335c3f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS632271256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9c04f0127bd9b01091ceba8280ebd05664c469cc17ed2d1e81fe58f8e5271b. 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/QM42K2148590.