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 0x53f1f4f78b18443707b8c83c35f29e4c7ec1986a2250569a2192556d2fece645. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09521e17-86fa-4852-8123-2283ab4f2635.json and https://artists.proofprofile.net/proofs/artist/09521e17-86fa-4852-8123-2283ab4f2635.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 0x9fbfd92b15f21511296bd9456d408ffb4f5751ab33062ea6da607038386c7d2c. 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/JPA969590094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca36fa50131553de30a7c44582d6cf9a8dc9afdb329401c5e46790840a8cc0. 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/JPA969590095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b148b0a8f0b958ec862591e9052b04175cdf9677445bc32874c4c01f3ece4b. 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/JPA969590097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38745e139882e480bf339ca4380f072760767c34f377b759979c05403d4fb2. 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/JPA969590106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad170a5667472736c52c14d33acaca514968c5140f3c1e1ef4a7b6d2164522. 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/JPA960590109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b191c2bd70e67cd00451e5ff50f7dc316fe8f9e5295fa8493508db952bfef6. 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/JPI800200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c60f39eee33e3bc996a9c41b08946355af1a270632e6e73eac153bfa2f4e1b9. 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/JPI800200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191dd240ba5860202d355b60c67ed20fb8b231cd7fe10f43a75f1e2fceee2cb. 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/JPI800200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d80adf1bc761a538b83e66f832ec763777eb0e9dbb194f70e716de344b1b09. 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/JPI800200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b91a869914f8b3206d9bcb5db45923b704955ea5c188776ca3c2ea75a1c1145. 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/JPI800200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc237ba69273bf34f0d0ea1f17d2a08c2f61ed793468e6a0bb818f3d6ccbe094. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPI800200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d635be052b80313820bc82040a0bebf1d0c6274dfadae80bba2174ebda29e3b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPI800200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575daaa34d93fffaaea2b6c40a0906411d8cb1c79624176c7714f624fad2b46c. 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/JPI800200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6766021ea7241d288a8f1d39c9b759433c8ca9aab75ea6c045d1c3907811c166. 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/JPA960590521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f04a64550197db503b26f23e9dcf073547e7cee6ddee2e95ff5e632b5e92da. 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/JPA960590523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ec89036c18f0fe757cb92247b61941ad0269290d6219091a23259d78f7d016. 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/JPA960590524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eb86b1cc657c3e4c45fa055b0dd2f7e26f3a1b4e14addd0a74e840576395f9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPA960590527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197a8afc6e240d1cb35ce13f644af9a106d8036d304ea773b05a13a0809f4dce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPA960590528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239b9705b2504f2a7cc7561ad5291d28468d2addad00b1da9255e4742503de39. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPA960590522.
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 0x6b790a3d97343b299b6f861a3fcdda0fcc988d133ff029c7533e5026c528f8ef. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPA960590525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6a271abe789c6725a8b170b2d8e1d77c3d15033d28f8067e6c022b7163b3c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPA960590594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11abb0c9435e8019979b39fb04f8ce34b910a264986643dc72782943b43b5635. 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/JPA960590596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda98d29ba7f57d6669662026ac34630a530ed7b7f90f2eea8a5934bd072efdfb. 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/JPA960590597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68514006cbf1290708a18f1b422a840d0546156fea7433ea560f83ddf1c2440. 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/JPA960590599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab79ba1c1bbf13a414fd8787e9451e59d51a7142ccf825af7e3af34a586cd22. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/JPA960590595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84908befb9b65b08b846e18920da90bab4df8d41c49940aef782b0f2a9abfd76. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/JPA960590598.