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 0x19a739ed83c8076b0f6a054d828cb1c4611009f25b05dc6beeb4d22588088e3a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2acf7764-00b0-4af3-af19-3041180e5d45.json and https://artists.proofprofile.net/proofs/artist/2acf7764-00b0-4af3-af19-3041180e5d45.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 0x03cc629cd5b51c6e7734f9049482b0750db345a267615c3d853993599fde9c2e. 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/FR2X42158541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4fca4abe623db14bb8f3983b0fb4a8c4383db21cfe69126e029aef4d6c3c92. 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/FR2X42158544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bf8ce4e58aa485750938bf166dc63b1e80fc8d3647b34784653ff726161a6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X42158545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748538205131fb796f4a27e4a06ddd92fff7d1887ae606b25755ec02fde2a03. 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/FRX202229810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec08b5c0dae7def6846e2e478f1d8ab5f7f4371ef6f720cf956a108667c9b6. 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/DGA062312730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e550c05c74136b34b1b0ea0627cc653adf163a0374ff6bc1dca81aaa2c9831. 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/DGA062312731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56879000f3f18c4a2e0374d84b6190b87c7c740fee6828a5248fd7c2fa794f04. 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/DGA062312732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c72d037cbc3a39399d839f5e8338ec60d6086485e6ed4088ec351a95399776. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DGA062312733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332b0bff0a0a4cdb885bcee25726ec78b65e8175f1e94b00bd6a9c5eccabb4b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062312734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ef4383d6e73dbd9173301394462381a750ab04d068d40125f6c8cc1ecb8e27. 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/DGA062312184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd2e2f4132599e9421d66c844265e72520d8838d34c750f0244e813d3b1cea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062312185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef00363bc01bf2c150794e751ec965a857ab17712e0ffdbbe454c1b209a3ed94. 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/DGA062312187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0599e57d644abf4bcfb55e1aad70b319209c9d1ba9f7e0810620e2bcb282ac7. 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/DGA062312189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac59d0a74033e9c7b0205997e0c12bcdf48c60e23321f7fb889eed33eb5305a. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DGA062312190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc828f7b74f41b8f6d4d74b4c9089b5c353526653e8082c059170138dde4df4c4. 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/DGA062312191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9509442b9791562034d57c03813cc7df18312bc6249154e92063aec4e6e6a8e. 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/DGA062312188.
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 0x9d8d6ebd7a328dd515e828503c0cd19e125c44b933822adb628bf63b052c691d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062313886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5949088c6e9585e95fd5ccec2d5c726da508f73454c744ceaa5bbad27f149f8a. 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/DGA062313887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b6ce5be46ca52ddd3c74166d3d5093c5efae8e56dbc3e0b9ab7999dcfad88. 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/DGA062313888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8271fc874a0a5835594c340792217d8689507ad46ba1afbe2ec90416c56024c8. 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/DGA062313889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23060a756c3efc0411b45e0b9454f1170ce3705015d3fd787ab30efe04aa1820. 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/DGA062313890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd87227582dc54abe81b6b40d79d8cb6aea4a9cc28f0627dd6790b7fb1a3fa6. 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/DGA062313891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b713445c6c960fddb30402c1f097f41efc14ff77da78e494c34e1065911bc. 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/DGA062313892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4932228b572823ae7b4c234eb9ac862fbc386363d15ff8e652147d82add909. 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/DGA062313893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31922c132ad5f7cd47095a1451629b88cd6adf3a80b3a51f0dff10116cda859d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA062318504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe138bf232ee28aa28abb2f57a0bb410a008e7dd07507d5e1f55d4376007c1677. 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/DGA062318505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2116491a4e1b2cf1351ac48649dce4efe0f3b4069effb8269dbfc39724c2200. 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/DGA062318506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0d454776f3136d866e29d6956156725d8421df4eac9d9f32cbbca8fda91f9. 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/DGA062318509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630dd243bf219e2a00cd00af1925a1f609e1c7b7962425ff744d4ee8f6be44a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA062318510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8865bc0dcc2a447eb3f4c7223dda232088c840e8e72ef15e281846c8b95b68. 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/DGA062316568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6637a1e0dc52ca30a43510a37d0d8bdf6c50d91c9349a7dfe8595cef93ed10f. 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/DGA062316572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c384f9af01558c7fa4797a5ab2090b50241646a2e33831f660cf17c88608cb. 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/DGA062316571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aea1b52d003f4fc7cc7c1e23cbeeba1d4fa97b017ab1967b6addbde542205b. 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/DGA062332558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3696b23fe7e4d4c75f6fb793e02a4ebe2d680096fa63e2fa795a027d3a05beb. 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/DGA062332559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb987fa66eaec4889aa0cfd6e613f88629f36937daab0153f3093857853cb08b1. 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/DGA062332561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0358fce811aa2a6e5e16bd7c60b667fe62e0920b66cb20e0ea6a33db78c39b. 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/DGA062332562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1e8d3d6583a4f96a1e1392ae4d4ecbc3e7ef2e418f3cf6f68a5a11141e3ac. 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/DGA062332563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab244ba9f10b6ae348083457d534bddf89bb8e02f358ef9caebae27054f96d6. 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/DGA062332564.