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 0x8110180b6ea0b9f75fb3484493a9f838f1140b4d4e19d272c2404764beac300e. 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/bef41631-e656-44ac-9e3f-436d34c91c37.json and https://artists.proofprofile.net/proofs/artist/bef41631-e656-44ac-9e3f-436d34c91c37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf3a2aa19bf38d62ee68dcba581be231f7ff8d39923a9bdce017d05693d0a0804. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHN32545040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798028c4ec00b68c6293b35e915650d0a638ef43d899ea96b0fd38d92d8539a9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZHN32544996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d41f43d1ba9397402d64339708edca81c23426f24ae8727d84536ca545de10. 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/QZHN32544978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebdac926054eb361e9e8942c54a375faeab19411fd4e4f80d89d2efb29c2cab. 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/QZHN32550332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74fca62ae0b44f7645993ff8e51c6d813bb1ecaf850528081b2028fceb9ee5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32545008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053a6e29cfd960150233961215f8417254ca92912ebe7a1229532827baff008. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZES92582521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3baf97d3b35f8fd51ea243584329b9e3ec414b84e23b2f0ee81fe01052dd0a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN52595205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6108a64c4f39bf145abe09ffa65c9ed1b369d9c7bf32c7ba80107f8cc625e7e1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLC062530926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d472d18b327a3941e707392c24e8aa3a7a006126b475de832e6a617da6b02d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHN52598990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb404408c974fd98ce21f9cd7ba76791b4cb4d908e6dfcf843a389a4453d2f2f3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN62568156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842dfb8e6e3de1f25184b741089e8fff0e27cc1de6ee2b4388e3c328b6cf2942. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHN72538361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ad6427f6017486f66951aac70777aed97bd9f6d8d64a87ef67ee8c7c1aa2d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHNB2540246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f49292747554709ac602897dcfbb5cb0deea0919297f337063f3a8199c0dea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6Q2597018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd363dc29734ee56c768481c167711e1bb69e41e0189d922ccce3db00652c28f5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P2537231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047fe1002775ac31c9a79d6c4e35c4c882418f53543df9e837245e0d599e1369. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLC062530180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49e79d0749155ffd065e629890a47cf64c2cad9b0aa60584b8ee6158f50494f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6M2574181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbc0393323613e3ec2e9c724eafa176c7885c40eaab8ad7e68a17f6d3368cf9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLC062532363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9729f00f528cf9d1c7d8afc6c3d3ce1fc33bf29d530fe80b28b61db73de0a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6J2547048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04019386ca8af185d75d7622c88c415344175f429415e1b0ba7c4b2f77f03e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLC062530944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd4021ec0d37360e8cca199eb467bd890997ef87be4935c296416d9aea7e64. 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/QZK6F2518521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a72da3be23b888da40e4765415f704f9b81ce456ca6e56734084c2c037105d1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMEP2501778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11958eb891d37b6f3fc1fcdc89f177da4decd414b7b4fc550eb8da435a5c690. 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/PLC062530195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc991f7fed18c2bbdc22e91ee58881617d667ee90fb9b49e0ecbbd2a8e576fe29. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PLC062532366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8171c52f692a48ab9c472379be6ae59e3ae8e0fe5c11150f19e1e9afb6b882. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/PLC062529688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55074d203592f6857961a373f330bfd1d10e6e141fcf0e8f20ea6d49bfc29ba0. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/PLC062530373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf2e9849b69a46f93dfad0c56f626263d60f49fe07b2883ce3c36679b2414a0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/PLC062529459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473a6e827f7609ef06305eee60dffe0bd8a61d5738c522b22e92f036f0d2768. 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/PLC062533739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50654a693887540fbf6a0131b8b68e44326276632cac799f53999e339cdd1e0b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/PLC062530904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4362d2d54c9108017e1bc8ffc3ccb3548360df328be7a5e9e9fa6ee551dd48cc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLC062536302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9398983c8037c6a84ba843339a35d90be1de727566e820b153057f4e6548f53. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLC062539473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be5a68977bcab177f94668c9627db214fb3d9ee8b541178c37edd4a53a16efc. 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/PLC062539957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeea02ca7395b7cefe87af48cb9d2d23db6da5c477c03a4402118d1c6d97e25. 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/PLC062546456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6600ec794768df9d0a048565538824279c28399ce24b558a60da5e45b0d85. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLC062548500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd3f4014796e1a4e91adfd0e7715bbb2e03731e7ffad25eff3147916e459ab2. 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/PLC062549813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7001679e80aadcad3ecb55aa378fad37bad229b084468b88261c2b141e4a9. 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/PLC062553227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4d85b40e1576ed5e6a83dede44aa5ed99ad7903d2c3919778d342218d6b58c. 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/PLC062538288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d43b3a565f42e7f12d0b39e79bde128f25ca1c59be6b4222b347f5cc42c616. 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/PLC062539712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2fc5e2fa3a77cb3aa319837a1a3d0b491372e1b0e73c64e912163a6d4e903d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/PL4K02502631.