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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456f8eddb67448a7c1f8f1e51ef98e7891de730c3f404e46dfd873135c03b72b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31278ecf-26e7-4f49-8c71-34ef3054af85.json and https://artists.proofprofile.net/proofs/artist/31278ecf-26e7-4f49-8c71-34ef3054af85.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540ef10f9369a9db7aeb3f30899491af94984fed25852217e0f3d08191aec70f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US3L61480321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77c3852744bd403fa050d4f49f1d1544dbc1e89f606b757ccfc9e384f60ceb2. 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/US3L61480330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7628c6aab9dac7dbf5f843bb6900f900616f091d8612bb3e44f225d7a1334eb. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/US3L61479551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1fb74e432674559c25bb069c800107e830e88a28fd316113225e11104f3376. 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/US3L61479688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b038be658daeed55c8ffba7654be77fae959b52ceb2050b85613b4492e6d4bd. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US3L61479689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca48fccbe80d512ce12b815f0425edc3362331ae77a43fe0b55e7df72bfacf7. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/US3L61479694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b52916f95e982dbb0e9d6cc802eccabacf4a6af8a42d28fce06b39c8977dd04. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/US3L61578459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e910ce3936437e14c9b69f69e058aa275a7a929c811d231c389e04d102a1e9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US6PD2500895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13be10ff8486c1f6c2b2a15a9c147692afa3ab8a3239052653f9a7c5c2e626c. 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/US6PD2500897.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976f56f67299d8150a3bd1d928801963c4cd7d469c8b49a1d7e215f2e0b1544. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCJA0601164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fae93a4e0d6f4f49ac5178269ea8cdc1248368906f677858771bd108ae58e1. 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/USCJA0611343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caffbb93bddad7dbd6b2d2ac8da8eb9c523c09eb55502f710773da0b2fb9f5a. 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/USCJA0611345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc2df96da73a879e9ee7f36a8593c3fb4db4352cb758bd2a5b5043060b7e082. 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/USCJA0611063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22982418d4c142c73b195d3925c927b4be263e60c9fedffe521fb553502571f. 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/USCJA0606204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac750d549243cc89295ff952933acb645c1d194fc73d44691f247cb51625436e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USCJA0601959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec1fc52888e9289687c3718803c0c7048f4a37138f05ecf59d563cf761a96e. 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/USCJA0601158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dd937882b25698696d9acf301d457b2b5a0d98177eb4330cff02a1b924a50a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCJA0602234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63854032b71ee93ad59e1d0286884c7910b4717cb1d1f8d7faa5bfc5271d22cb. 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/USCJA0605703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d6aefb079208cfd0a614e95e05115a7ea982201d1c4a1f22c641edec3a295d. 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/USCJA0613678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b7ef79e75241b34621095ef44e5c4a6762076a892b208be6287c5a1f237d97. 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/USCJA0605710.
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 0x8ab3d9a31ad24df2bb94903bb5fd190d763ac0e28f2f8c8786d571c3b675f030. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USCJA0601161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9512f30b2c7ebc268314ee74cedd82ca2a42db251e09b6b792a85f77f58ad2b. 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/USCJA0602966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c8907a91a33b51802b988863bf1ae7efff5269245a3ecd8f9515ca3ef2d34. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCJA0605709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444b22371fa35d043afa79e2aff8c3dd80f6faa78b12b077a52af21215a6814. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCJA0601157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f746e445901b972836a64464c4507bfdbfd22af3f0dd1f184eebef22d956f8. 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/USCJA0601166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4702fb7e62aedaa6994e39b2752ad3c4da8df150b15263d6ab00a2b4ad2398f. 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/USCJA0601162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa439480504010de720b39096c4f7d2b3ab4b00a364f7b6f083f9334fae4d4413. 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/USCJA0601221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4d2a35310e241c1e518b7683e69326631983745d571c0b393a7e7eb91ddea1. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USCJA0611341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f813c7bd25cbbae5b90633213813fcaf5ba933592b6428bb0d7dd3ba061d0f1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USCJA0611058.